[TheCommuter]

According to sources, 10 percent of traditional Republican voters plan to support Obama in November. Likewise, 12 percent of traditional Democratic voters intend to support McCain's bid for the presidency. This concept is certainly not new, since many working-class Democrats "crossed over" to vote for the Republican ticket during the Reagan administration.

http://en.wikipedia.org/wiki/Obama_Republican
http://en.wikipedia.org/wiki/McCain_Democrat