McCain Keeps Up Iraq Past/Future Attack on Obama

In Thursday Houston town meeting, calls Democrat's position on American troop presence "not logical."

Decries Obama's focus on previous Bush administration errors: "That's history, that's the past. . . . What we should be talking about is what we are going to do now."

McCain hits same Obama-past/future line at all Thursday events -- at press conference, on his campaign plane with traveling press, and at town meeting in Richardson, TX.