According to the latest Pew Center Poll;
Obama would lose one quarter of Hillary supporters in the general election. A quarter of Democrats (25%) who back Clinton for the nomination say they would favor McCain in a general election test against Obama. The “defection” rate among Obama’s supporters if Clinton wins the nomination is far lower; just 10% say they would vote for McCain in November, while 86% say they would back Clinton.
“Obamacans” – those Republicans who are supporting Obama — are outnumbered two-to-one by what we would have to call “McCainocrats.” There goes Obama’s theory of winning the election by converting republicans.