South Carolina primary race: Boos for Ron Paul's foreign policy - live 11.46am: Compare and contrast the audience reaction from last night's GOP debate on foreign policy: A. Demand that the US stop getting involved in foreign wars and treat other countries as it would be treated? Boooooooo B. Call the government of Turkey "Islamic terrorists" and suggest it be kicked out of Nato? Yaaaaaay 11.22am: So Mitt Romney has decided to firm up his "maybe, I don't know, whatever, time will tell" position on publishing his tax returns - and now says he will publish them in April. This comes at an unscheduled news conference held by Romney in South Carolina, trying to stop his unpublished tax returns from becoming a bigger news story after he flanneled last night under questioning during the debate. Now Romney says firmly that he will publish them - assuming at that point he's the nominee, one imagines - and also reveals that his overall tax rate is just 15%. Or as Romney's periphrasic syntax would have it: It's probably closer to the 15% rate than anything. Because my last 10 years, my income comes overwhelmingly from some investments made in the past, whether ordinary income or earned annually. I got a little bit of income from my book, but I gave that all away. And then I get speaker's fees from time to time, but not very much. Those "some investments" are worth about $200m we think, perhaps more, while the "not very much" in speaking fees amounted to $374,000 last year, getting about $41,000 a time. If you think that's "not very much" then ... you have a lot of money already. Having said that I'm sure the latest tax year sees less in the way of speaking fees for Romney, since his presidential campaign means he's giving away his words of wisdom for free. Here's an explanation of why Romney's "some investments" returns attract just 15% in tax. 11am: What effect last night's Republican debate had on the fate of Mitt Romney remains to be seen. But the conservative blogs and channels lit up on the subject of Ron Paul and his view of the US role in foreign policy. This video shows one of the contentious debates between Ron Paul and everyone else, including the bulk of the audience based on the jeers and boos. Here's the transcript of Ron Paul's comments, after being asked about his opposition to the US assassination of Osama bin Laden: There is proper procedures rather than digging bigger holes for ourselves. That's what we have been doing in the Middle East, digging bigger and bigger holes for ourselves and it's so hard for us to get out of that mess. And we have a long ways to go. We are still in Iraq and that's getting worse and we are not leaving Afghanistan and the American people are sick and tired of it, 80% of the American people want us out of there. I am just suggesting that we work within the rule of law. Like only going to war when you declare the law. Responding to Gingrich, Paul went on to say: My point is, if another country does to us what we do others, we're not going to like it very much. So I would say that maybe we ought to consider a golden rule in foreign policy. Don't do to other nations... Boos ... what we don't want to have them do to us. So we endlessly bomb these countries and then we wonder, wonder why they get upset with us? And yet it continues on and on. I mean, this idea that we can't debate foreign policy, then all we have to do is start another war? I mean, it's warmongering. They're building up for another war against Iran, and people can't wait to get in another war. This country doesn't need another war. We need to quit the ones we're in. We need to save the money and bring our troops home. This is not what a Republican audience is used to hearing - hence the boos and jeers at an unprecedented level for a GOP debate. Yet Paul continues to poll well despite his heretical views. In a sign of their concern, the war wing of the Republican party has started deploying its big guns against Ron Paul: on Fox News, Liz Cheney was rolled out to more or less accuse Ron Paul of being a terrorist sympathiser. 10.30am: Let's go out and about with the candidates today, shall we? Everyone is in South Carolina, apart from Mitt Romney, who is smoking big cigars in New York City lit by $100 bills: Mitt Romney 8.30am: Held a rally to discusses jobs and the economy, Florence Civic Center, Florence, South Carolina. 6pm: Attends a campaign fundraising event, with event organizers including Steve Schwarzman, co-chairman of the Blackstone Group, Sheraton New York Hotel, New York Ron Paul 10am: Holds a news conference. South Carolina State House, Columbia 2pm: Holds a town hall, Spartanburg 4.30pm: Holds a town hall, Rock Hill Rick Santorum 8.30am: Held a news conference aboard the USS Yorktown, Charleston, followed by a "national security town hall" 11.30am: Addresses the Aiken Republican Club, Aiken 2pm: Holds a town hall, Lexington 5.45pm: Participates in the South Carolina BIPEC 2012 Republican Presidential Candidate Forum, Columbia 8pm: Holds a campaign rally at Fuddruckers, Anderson Newt Gingrich 10am: Holds Florence Town Hall Meeting, Florence Noon: Attends US Global Leadership Coalition Foreign Policy Forum and Luncheon, Columbia 1.30pm: Holds South Carolina Farmer's Market town hall. West Columbia 4pm: Holds an "Ask Newt" tele-townhall: 1-877-218-6543 5.30pm: Participates in South Carolina BIPEC 2012 GOP Primary Candiates Forum, Columbia 7.30pm: Speaks at Greater CSRA Conservative Coalition Presidential Forum. USC-Aiken Convocation Center, Aiken Rick Perry 9.30am: Held town hall meeting. VFW, Murrells Inlet 5pm: Participates in BIPEC Forum, Columbia 8pm: Speaks at The Response, Greenville Jon Huntsman 10am: Has a long lie-in 10.12am: Thinks about doing New York Times crossword 10.18am: Hums 10.30am: Receives updated orders from Chinese paymasters 10.47am: Finally tears off latex mask disguise 11.30pm: Waits for submarine to surface off coast of California 10.10am: Another harbinger of Mitt Romney's Creeping Inevitability Tendency - sounds like a post-punk 1990s band somehow - comes in this new ABC/Washington Post poll out this morning: Romney wins the support of 35% of all Republicans and GOP-leaners nationwide, with former House speaker Newt Gingrich and Rep. Ron Paul neck and neck with about half the support Romney enjoys. Former senator Rick Santorum, who surged to a second-place finish in the Iowa caucuses, checks in at 13%, his highest level of the campaign. Here's the thing: questions of approval and electability in national polls such as this tend to rise and fall alongside a candidate's performances in the primaries. Candidate chicken and primary egg, if you will. 10am: Good morning and welcome to our continuing coverage of the South Carolina primary race. Here's a summary of last night's fiery debate from Ryan Devereaux: Republican presidential hopefuls set their sights on Mitt Romney in one of the more raucous debates yet this year. With just five days remaining before the South Carolina primary, Romney's challengers called the frontrunner's tax history, business ties and character into question. Newt Gingrich, who trailed Romney by 8 percentage points in the polls coming into Monday's debate, was widely considered to have performed strongly in the contest. Mitt Romney, who is normally known for his calm and collected demeanor appeared to be on the defensive for much of the evening. Texas governor Rick Perry challenged Romney to release his tax records - after much prodding, Romney said he might release his financial history in April, when the contest for the Republican nomination may well be over. The 3,000-strong, mostly white audience booed when moderator Juan Williams suggested Gingrich's characterization of President Obama as a "food stamp president" may be viewed as belittling to the poor and racial minorities. In a charged exchange, Gingrich seized on the criticism, claiming "more people have been put on food stamps by Barack Obama than any president in American history" - a fact that is numerically correct but does not take account of the economic reality President Obama inherited in 2008. The crowd also voiced its displeasure when, during a discussion of immigration, it was mentioned that Mitt Romney's father was born in Mexico. Ron Paul was also booed when he attempted to explain why the US did not need secretly to enter Pakistan to kill Osama bin Laden. Paul pointed out that the US had managed to capture Saddam Hussein alive, and that the Iraqi government had put him on trial. The line did not go down well with the audience or his Republican rivals. Campaigning continues in South Carolina today. Mitt Romney's spokesman has said that he expects Jon Huntsman, who dropped out of the race yesterday and endorsed the frontrunner, to campaign with him "at some point." Here's the Guardian's video package of debate highlights: