Uh oh. Here's another sign that top Republicans are backing away from Sen. Ted Stevens: Roll Call reports that NRSC chairman John Ensign refused to give a definite answer when asked if he was endorsing Stevens for re-election.

"I'm not going to make any comment," Ensign said. "There's a process in place and we're going to wait to see how that process plays out."

We've also asked the campaign spokesman from Senate GOP leader Mitch McConnell -- who is himself facing a tough re-election fight this year -- whether he supports Stevens, and whether he'll keep contributions he's received form Stevens' PAC. No answer yet.