If Congress is Republican as it now is, I'd vote Clinton. If Congress were Dem, I'd probably vote McCain.
A18 is either spinning or just wrong: moderate Republicans and center-right "outsiders" would leave the GOP and vote independent. Not every rank and file Republican is happy with the ways of Tom Delay and Company- and Frist is obviously into doing their bidding.
TCash,
your own behavior and the poll on this site contradict your prediction (and Jesus's). According to the poll result, Frist would won 45+ states as Democrats defect en masse to McCain