The Democrats are lining up. I’d guess that there might be a sufficient number of Republicans in the Senate to join all Democrats to block any Bush attempt to pass a Status of Forces Agreement treaty with Iraq. The question is, Will Bush try to bypass the Senate by making the SOFA an executive agreement with the Iraqi government? The answer is, of course he will.
But any agreement that opens the door to permanent bases should require Senate approval. Just as any future attempt to go to war should require a formal Declaration of War.