5.00pm. Missouri now being called for McCain, who leads Huckabee and Romney 33.1 per cent to 31.8 per cent and 29.3 per cent. Democratic contest still too close to call in Missouri, but Obama holds a slight lead and the trend has been favouring him for some time.
4.44pm. Fox calls Alaska for Obama. Slow progress in New Mexico.
4.36pm. Everyone now calling Arizona for Clinton.
4.25pm. Fox and ABC call Colorado for Romney.
4.23pm. CBS, Fox and ABC (though not CNN) calling McCain for California.
4.21pm. Obama has hit the lead in Missouri, 49.3 per cent to 48.7 per cent with 98 per cent reporting, after a number of outlets earlier called it for Clinton. Given that Democratic delegates are allocated proportionately, this is mostly of academic interest. Not so the state’s Republican race, a winner-takes-all contest in which McCain leads Huckabee and Romney 33.3 per cent to 32.0 per cent and 29.5 per cent, also with 98 per cent reporting. Fox and ABC are calling it for McCain, but not CNN.
4.13pm. NBC and Fox are both calling California for Clinton.
4.12pm. CBS calls Montana for Romney.
3.56pm. CNN now calling Utah for Obama: he leads 53-41 with 37 per cent reporting.
3.50pm. No significant results yet from Los Angeles, San Francisco, San Diego or Sacramento.
3.38pm. Clinton leads 55-33 in California with 10 per cent counted, but pronounced regional variations can presumably be expected from a state that boasts both Malibu and Compton.
3.37pm. CNN calling Minnesota for Romney.
3.32pm. Fox’s call of Utah for Obama might also have been premature (I heard it on Fox News Radio; not sure it ever appeared as called on the website). Only 13 per cent reporting and Obama leads 45-44. Presumably the Fox call was based on an exit poll.
3.29pm. Clinton leads 51-40 in Arizona with 48 per cent reporting, but nobody’s calling it.
3.25pm. Fox’s call of Tennessee for Huckabee may have been premature (they’re still saying it on Fox News Radio, but not on the website). He leads McCain 34.1 per cent to 32.4 per cent with 83 per cent of precincts reporting.
3.20pm. McCain gaining on Huckabee in Missouri: now 33-32-29, compared with 35-32-27 half an hour ago.
3.15pm. Fox calls Idaho for Obama and Missouri for Clinton.
3.15pm. Fox calls Colorado for Obama.
3.10pm. Fox says Clinton wins American Samoa, and Romney wins Montana.
3.03pm. Fox News Radio reports McCain doing better than Romney in California from absent votes, but Romney doing better in normal votes. Clinton just ahead of Obama.
3.00pm. Also not sure why nobody giving Romney North Dakota, where he leads McCain, Paul and Huckabee 36-23-21-20.
2.58pm. Not sure why nobody calling Montana for Romney: he leads McCain, Paul and Huckabee 36-24-23-17 with 89 per cent of precincts reporting.
2.53pm. Nobody calling Missouri Democratic either, but Clinton leads 53-44 with 68 per cent of precincts reporting.
2.48pm. No one is calling the Missouri Republican race: Huckabee leads McCain and Romney 35-32-27 with 66 per cent precincts reporting.
2.46pm. A couple of outlets calling Georgia for Huckabee.
2.38pm. Fox calls Arizona for McCain and Tennessee for Huckabee.
2.29pm. Fox calls Utah for Obama.
2.25pm. Minnesota being called for Obama, who seems to be picking up a lot of the smaller states. Expectations he would perform well in caucuses have apparently been confirmed, boding well for him in Colorado and Idaho.
2.21pm. Fox News Radio and CNN call Connecticut for Obama.
2.15pm. Huckabee giving a speech, and not sounding of a mind to withdraw.
2.14pm. ABC calls Kansas for Obama.
2.08pm. Fox calls Oklahoma for McCain.
2.06pm. ABC also calling Utah for Romney; no surprise of course that he should carry the Mormon state.
2.03pm. Fox News projects Obama as winner of North Dakota, giving him seven states to Clinton’s six, and Utah to Romney.
1.44pm. Romney coming third behind Huckabee in many more places than expected. Almost time to call the nomination for McCain, pending one or two larger states.
1.31pm. CNN, ABC and Fox News Radio say Obama has won Alabama, which was lineball in late polling.
1.21pm. Fox calls Alabama for Huckabee.
1.18pm. Chap on Fox News Radio says McCain has won New York.
1.09pm. Fox calls Delaware for Obama.
1.07pm. CNN calls New York for Clinton, which is no surprise.
12.55pm. Fox calls Massachusetts for Clinton.
12.54pm. Chat on Fox News Radio indicates McCain is looking very good overall.
12.50pm. Winner-takes-all Republican contest for Delaware called for McCain, which was considered likely but not certain.
12.44pm. Arkansas being called for Huckabee, who is clearly doing better than expected.
12.36pm. Tennessee also called for Clinton, which was expected.
12.35pm. CNN calls Arizona for Clinton and Huckabee. The latter would be a big surprise if accurate; polls had Clinton with only a narrow lead.
12.29pm. The Times on Democratic exit polls:
The AP survey’s findings, leaked to The Times tonight before polls closed, should be treated with caution because they have been wrong before. But the early findings showed Mr Obama winning Georgia by 74 points to 25, Alabama by 59 to 37, Illinois by 69 to 29 and Delaware by 55 to 42. He also had narrower leads, possibly within the margin of error, in New Jersey, Connecticut, Massachusetts and Missouri. The poll indicated Mrs Clinton was leading by seven points in New York – less than expected – and Tennessee where she had an 11 point advantage, according to the poll. In Oklahoma and Arkansas she was shown as more than 30 points ahead. In California, she is shown just ahead, by perhaps as little as three percentage points.
12.13pm. CNN is also calling Illinois for Obama and Oklahoma for Clinton on the basis of exit polling, though these of course are not winner-takes-all contests. On the Republican side, Illinois (district-level PR), Connecticut (winner takes all) and New Jersey (winner takes all) are being called for McCain, and Massachusetts (two-tier PR) for Romney. All of this is consistent with pre-poll expectations.
11.33am. Further to the previous entry: The Raw Story tells us “Geraghty’s leaks of exit poll data have not always proved accurate. For instance, his information before New Hampshire polls closed showed Senator Barack Obama defeating Senator Hillary Clinton.”
11.23am. More on exit polls from Jim Geraghty at the National Review:
The early wave in California: McCain 40 percent, Romney 36 percent, Huckabee 10 percent. Fascinating and fun as it is, I remind my readers that this doesn’t tell us that much, as we don’t know what the district-by-district breakdown is. Also, there are three million absentee votes that I’m pretty sure are not included in this. So while these numbers are nice to hear for McCain fans, I take them with even more caution, skepticism and grains of salt than usual. Missouri: Romney 34 percent, McCain 32 percent, Huckabee 25 percent. Winner take all. If these numbers hold – and these are early voters, the later waves may change the final a bit — it’s a big, big win for Romney. Georgia: Huckabee 34 percent, Romney 31 percent, McCain 30 percent. Now on to the NYC-metro-area states: New York: McCain 46, Romney 35, Huckabee 10 percent. New Jersey: McCain 48 percent, Romney 35, Huckabee 9 percent. Connecticut: McCain 50 percent, Romney 32 percent, Huckabee 7 percent. More or less what we expected. Now the big Mitt states: The early wave in Utah: Romney 91 percent, McCain 5 percent, Huckabee 1 percent. I think I’m ready to call that one. Massachusetts: Romney 54, McCain 35. But in McCain’s home state… Arizona: McCain 44, Romney 39, Huckabee 8. That’s a heck of a lot closer than I had expected. On to the South, where the numbers at this point look good for Huckabee… Alabama: Huckabee 42 percent, McCain 33 percent, Romney 20 percent. Tennessee: Huckabee 34, McCain 28, Romney 23. Arkansas: Huckabee 33, McCain 21, Romney 19. Oklahoma: McCain 34, Huckabee 32, Romney 27. A barnburner! Delaware: Romney 43, McCain 34, Huckabee 18. Not a big state, but it’s winner take all, so I’m sure Team Romney would take it. Illinois: McCain 47, Romney 31, Huckabee 15.
11.14am. Various media outlets calling Georgia for Obama purely on the basis of exit polls.
11.10am. Jason Zengerle at New Republic on exit polls:
The perils of posting these are obvious (President Kerry and all that), but the exit poll results that I’ve seen show: Obama trouncing Hillary in Georgia, Alabama, and Illinois; Hillary trouncing Obama in Arkansas and Oklahoma; Hillary with leads in New York and Tennessee; and Obama with leads in Delaware and Utah (although there’s only one wave of exit polls for Utah). Everywhere else–including Massachusetts, Connecticut, New Jersey, Arizona, and California–is extremely close.
8.20am (Eastern Australian daylight time). This post will be used to cover today’s Super Tuesday developments, though I don’t promise that my coverage will be greatly timely or comprehensive. We’ll see how we go. The action will begin in earnest when polls in most of the eastern states close at 8pm US eastern time – noon eastern Australian daylight time. Polls in all-important California close three hours later. The one conspicuous exception is West Virginia, which uniquely held a state presidential convention today rather than a primary or caucuses. This has already wrapped up, resulting in Mick Huckabee securing the 18 delegates under the winner-takes-all vote. Huckabee won on the second round of voting after trailing Mitt Romney at the first by 464 votes (41 per cent) to 375 (33 per cent), with John McCain on 176 (16 per cent) and Ron Paul on 118 (10 per cent). Paul was then excluded, and at this point McCain’s supporters were reportedly instructed to throw their weight behind Huckabee to thwart Romney. This delivered victory to Huckabee with 567 (51.5 per cent) to Romney’s 521 (47.4 per cent).
The Democratic candidate will be chosen by 4049 delegates at the party’s national convention from August 25-28. This includes 796 “superdelegates” who attend by virtue of holding senior party positions, and who are not pledged to particular candidates. By the reckoning of the 
The Republican candidate will be chosen at the convention to be held from September 1-4 by 2380 delegates, including 1917 who are pledged to particular candidates and 463 who are unpledged (not normally referred to as “superdelegates” in the Republican case, but essentially the same thing). Super Tuesday will see 1014 pledged delegates chosen from 21 states. The eight states which have held primaries and caucuses so far have chosen 95 delegates pledged to John McCain, 85 to Mitt Romney, 26 to Mike Huckabee and six to Ron Paul. A further two unpledged delegates are committed to support McCain, seven to Romney and three to Huckabee. The Republicans make life easier for election watchers by allocating a number of states’ delegates on a winner-takes-all basis, while other states operate similarly to the normal Democratic practice. Poll averages shown below from New York and New Jersey have been limited to the past week to account for the withdrawal of Rudi Giuliani, who has thrown his support behind John McCain. If anyone can explain to me in reasonably simple language how the Colorado, Minnesota and Alaska caucuses work, I shall be most grateful.