I seriously doubt they're trying to make Logan out to be a caricature of President Bush.
I heard him on Rush the other day, too. I know there are conservatives involved in the writing. I was sort of teasing in that post, though it IS Hollywood, you know. ;^) I also think that a good majority of the "24" audience is likely to be conservative.
Actually, I thought Logan was actually kind of Nixon-esque at first--especially when he wanted Mike to pray with him. I think Logan is probably a compilation of the worst character traits of many political leaders. Just a hunch.
I am sure you are probably right; I was just having a little fun trying to figure out the plot, and with my moonbat hat on, the pieces fell into place so nicely...