President Bush is poised to sign the housing and Fannie Mae bailout bill, after the Senate passed it with 72 votes on the weekend. But an underreported part of this story is that Majority Leader Harry Reid refused to allow a vote on Republican Jim DeMint's amendment to bar political donations and lobbying by Fannie and its sibling, Freddie Mac.

This is a rare parliamentary move for a body in which even Senators in the minority party have long been able to force votes. The strong-arm play illustrates how politically powerful...