GOP should put money where it will help

David Frum, of the conservative American Enterprise Institute, argues that the GOP should give up on McCain for now and shift resources to protecting republican senate seats.  I think he's right; when you have limited resources you need to put your money where it will be most effective.  Right now, even though McCain as president would be very effective, the likelihood of it happening is 5-10% at best, while maintaining some of these highly contested senate seats has at least 50-50 odds.