The Hill has a running list up of which members of Congress are endorsing which presidential candidate.  As of this posting, the tallies stood at Romney – 61, Perry-13, Gingrich-8, Paul-3, Cain-1 Bachman-1, Santorum-0.

Montana Congressman Rehberg is not on the list.

To be sure, Rehberg’s absence could simply be explained by his fear to make a choice this early. But given that we already heard his de facto endorsement of Bachmann in February of 2011, it may be that he was asked by the campaigns to do them a solid and stay out.  After all, Rehberg has been at the center of Congress’s failure and brinksmanship throughout the budget debate. As David Weigel theorizes in Slate, the brinkmanship and failure to accomplish anything is tanking the popularity of House Republicans:

there has been a rarely-admitted fatigue with the Republican House, and its inability to get anything done unless there’s last-minute stop-the-clock brinkmanship…it started to mean that you were part of Washington machinery that was creaking and belching acrid smoke.