Five states hold Republican presidential primary contests today with more than 200 delegates at stakes. CNN.com Live is your home for all the latest news and views from the campaign trail.
Today's programming highlights...
10:00 am ET - Immigration enforcement hearing - One day before the Supreme Court takes up Arizona's controversial immigration law, a Senate judiciary subcommittee looks at the clash between state/local-level and federal-level immigration enforcement.
12:00 pm ET - John King live chat - CNN's John King joins us this afternoon to discuss today's GOP primaries and what they mean at this point. We'll also discuss speculation over who will be the GOP vice presidential candidate. Tweet your questions to John @JohnKingCNN.
1:15 pm ET - Obama talks student loans - President Obama will call on Congress to keep student loan rates law the University of North Carolina in Chapel Hill. He'll make a similar pitch in Boulder, Colorado, at 6:45 pm ET.
2:00 pm ET - Gingrich in North Carolina - GOP candidate Newt Gingrich is keeping his fading hopes alive in North Carolina today. He'll tour the Billy Graham Museum in Charlotte, then addresses supporters in Concord at 8:30 pm ET.
9:00 pm ET - Romney in New Hampshire - GOP frontrunner Mitt Romney will spend primary night in New Hampshire, where he'll deliver a speech on how "a better America begins tonight" in Manchester.
CNN.com Live is your home for breaking news as it happens.