IF A, THEN A. Good to see my colleague Harold Meyerson continuing the GOP-has-no-ideas argument. As he notes, their case for retaining Congress isn't an agenda, but a tautology -- if the Democrats win Congress, then the Democrats win Congress. It's an unsettling thought, to be sure, though when pollsters ask, "Overall, which party, the Democrats or the Republicans, do you trust to do a better job in coping with the main problems the nation faces over the next few years?,� Democrats come out on top by a 14 percent margin. One might also wonder why the GOP is so obviously terrified by the prospect of investigations. Bush hasn't done anything wrong, has he?