The race to the Republican presidential nomination remains up in the air. Watch CNN.com Live for all the latest news and views from the campaign trail.
Today's programming highlights...
10:15 am ET - Biden talks college affordability - Vice President Biden and Education Secretary Arne Duncan will pitch federal efforts at keeping college affordable at an event in Norfolk, Virginia.
12:00 pm ET - Romney primary day lunch - GOP presidential candidate Mitt Romney is getting ready for today's Wisconsin primary by holding a special lunch in Waukesha, Wisconsin.
12:30 pm ET - Obama talks to the press - President Obama is expected to discuss the budget and other issues when he addresses the Associated Press Luncheon at the ASNE Convention in Washington.
8:00 pm ET - Primary night coverage - The Republican presidential candidates are looking for votes today in Wisconsin, Maryland and the District of Columbia. We will be there for all the results and candidate reactions.
CNN.com Live is your home for breaking news as it happens.