from Florida, Patrick Murphy, who used to be a republicon until he realized what his party had turned into. He got into the race because he was disgusted by Allen West.
Murphy has claimed he was so taken aback by some of the things Republican incumbent Representative Allen West was saying in Congress and on television that he felt compelled to run against him. Murphy was supported by Florida's former Republican Governor Charlie Crist and former Democratic President Bill Clinton. The race was one of the most expensive congressional races, and called one of the ugliest, in the 2012 campaign.
After a close vote, the state of Florida certified a Murphy victory over West, days after the election. The West campaign contested that there were errors in the vote counting process and took legal action to request a recount of disputed votes. On November 20, 2012, the West campaign conceded the election to Murphy.
Political positions Murphy became a Democrat in 2011. He says he switched from being a Republican and a Mitt Romney supporter because of his disgust with the Tea Party movement. He has been described as a "pro-choice, pro-LGBT rights but 'not ultra-liberal' Democrat who values fiscal responsibility." He supports the Affordable Care Act and Medicare. He favors income tax increases for the wealthy, but implemented on those earning over $1 million annually instead of $250,000, as advocated by President Barack Obama.
http://en.wikipedia.org/wiki/Patrick_Murphy
And, there's the Republicans for Obama during the Campaign..