The Portman, uh, boost

Toda's Quinnipiac poll has some interesting numbers. See question 13:

13. If Republican presidential candidate John McCain picked former cabinet member and U.S. Representative Rob Portman as his running mate would that make you more likely to vote for McCain for president, less likely to vote for McCain for president or wouldn't it make a difference?

Turns out more voters say they'd be less likely to vote for McCain if Portman were his pick.

Even among Southwest Ohioans and Republicans, it makes almost no difference.