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GUESTS: Candice Hoke, Director of the Cleveland State University Center for Election Integrity in Cleveland, Ohio, and an election law professor at Cleveland State University; Robert Jensen, author and Professor of Journalism at the University of Texas at Austin

Hillary Clinton won 3 out of 4 primary election races yesterday, including Ohio, Texas and Rhode Island. Her rival, Barack Obama won the state of Vermont. Still, Obama has built up a delegate lead before yesterday that he continues to maintain because delegates are proportionally split by district. According to CNN’s estimates, Obama now has 1,451 delegates to Clinton’s 1,365. A candidate needs 2,025 national convention delegates to win the Democratic presidential nomination. Winning Ohio and Texas were seen as essential to keeping Clinton’s campaign alive. She won 54-44% in Ohio and 51-48% in Texas. This week Wyoming and Mississippi will hold their primary elections, with Pennsylvania, North Carolina, Kentucky, and Indiana in coming weeks. Meanwhile John McCain predictably swept all four states yesterday to clinch the Republican party nomination for President.