Gallop just released a poll which shows that 28% of Hillary's supporters will vote for John McCain if Obama is the Democrat nominee.
Almost as bad for the Dems, 19% of Obama's supporters say they would vote for John McCain if Hillary is the nominee.
Either way, we are looking at a defection of more than 10% of Democrat voters to McCain.
To you Dems:
Give me your tired, your poor,
Your huddled masses yearning to breathe free,
The wretched refuse of your teeming shore,
Send these, the homeless, tempest-tossed to me,
I lift my lamp beside the golden door.