David Frum:

Some have wondered whether the president’s proposal was not timed to help Republicans in the 2006. I asked that question in this very space last week. OK: now let me suggest we do the unthinkable and submit Sen. McCain’s actions to the same suspicious scrutiny.
Most political observers agree that the worse Republicans do in 2006, the more likely they are to turn to McCain’s maverick candidacy in 2008. Republicans don’t like or trust McCain, but they want to win – and the more they are convinced that their party is otherwise in serious trouble, the more likely they are to believe that McCain’s anti-party candidacy is the solution.
McCain may have heard these theories too. If he has, and if he agrees, is it not in his interest to maximize Republican losses in 2006? If a vote on military commissions would embarrass Democrats, does it not help Democrats to prevent such a vote from occurring before Nov. 2? And what better way is there is to delay such a vote than for the ultra-hawkish McCain to raise an enormous ruckus against the president – and thus provide cover for Democratic stalling techniques?
Just asking.

I that out because it was his sexiest point, but you should read David’s full post (here).