Mickey Kaus offers an intriguing reason Bush might be less-than-crushed to see the Democrats take the House this fall:

b) But if a Democratic House really would pass a McCain-Kennedy style immigration bill, maybe President Bush isn't as horrified at the prospect of Speaker Pelosi as he seems. He'd achieve at least one major part of his second-term domestic agenda. Legacy time! That might be worth a few Conyers-led hearings. ...

Of course, that's one reason a Democratic-led House might not pass a Bush (or McCain) immigration bill.