Former President Bill Clinton visited several southern Indiana communities Thursday on behalf of his wife's presidential campaign.The former Commander-In-Chief told the crowd at Boonville High School that Hillary Clinton is better qualified than her rival, Barack Obama to win back the White House for the Democratic Party.He chided the Illinois Senator for proclaiming that he's never accepted a campaign contribution from an oil company.“No living person who’s every run for office has done that. It’s been illegal to take political contributions from oil companies for 100 years," said Clinton. "It’s almost like saying, you know, ‘Vote for me I brush my teeth every morning,’ or ‘Vote for me I never robbed a bank,’ or…you know.”Indiana’s primary is on May 6th. Senator Obama is also campaigning in the state this week.