With less than a month to go until a high profile special election to fill a vacant congressional seat in South Carolina, things are heating up. Democratic nominee Elizabeth Colbert Busch, the sister of satirist and Comedy Central host Stephen Colbert, Tuesday released her first ad of the general election campaign. Her Republican opponent, former Gov. Mark Sanford, whose political career was sidetracked back in 2009 thanks to a well-publicized affair, was quick to respond and criticize Colbert Busch, and he also accepted invitations to four debates between now and the May 7 contest. "I'm Elizabeth Colbert Busch, and as...