On the campaign trail, voters head to the polls in Wisconsin and Hawaii today. Wisconsin is expected to be the tightest contest in the Democratic race since Super Tuesday. Senator Hillary Clinton is hoping to end Barack Obama’s string of eight victories over the past two weeks. The race has heated up with negative ads and a charge of plagiarism from the Clinton camp against Obama. Obama has admitted to borrowing language from Massachusetts Governor Deval Patrick for a recent speech but says the plagiarism accusation is an act of desperation. Patrick says he supports Obama and that the two have exchanged ideas for a while. Meanwhile, on the Republican side, frontrunner Senator John McCain has picked up an endorsement from former President George H.W. Bush. The elder Bush appeared with McCain Monday in Houston.

George H.W. Bush: “His commitment to America is beyond any doubt, but most importantly he has the right values and experience to guide our nation forward at this historic moment, and so I am very proud to endorse John McCain for the presidency of the United States of America. Few men walking among us have sacrificed so much in the cause of human freedom, and I am happy to help this remarkable patriot carry our party’s banner forward.”