CNN

 On The Trail:

* Hillary Clinton attends a town hall at St. Norbert University, in De Pere, Wisconsin, and a rally in Madison, Wisconsin before heading to Ohio.

* Mike Huckabee is in Wisconsin where he greets diners at Hudson Bagel & Coffee Co. in Hudson, and attends rallies in Eau Claire, and Appleton.

* John McCain and former President George H.W. Bush hold a press conference in Houston.

* Barack Obama attends rallies at Youngstown State University in Youngstown, Ohio and at Beloit College in Beloit, Wisconsin.