Virginia senator George Allen will run for re-election next year, and then for president in 2008. If he winds up on the GOP ticket in 2008, and if his ticket wins, then he will have to quit the Senate. Newly elected Gov. Tim Kaine, a Democrat, will pick his successor. My guess, at this early stage, is that he would be inclined to choose outgoing governor Mark Warner, a tax raiser who is mysteriously and bafflingly popular. That would give Virginia two senators named Warner. More important, it would give Virginia two governors that conservatives don’t especially like. And, depending on how the 2006 and 2008 Senate elections go, Kaine’s choice could influence control of the Senate.