When it comes to plans to reform the way in which filibusters work in the Senate, one group that stands to lose the most is mounting some opposition to the idea.

Abortion advocates tell Politico they are concerned about efforts by Senate Democrats to take away or limit the rights of the minority party in the Senate to use the filibuster to stop legislation, amendments or nominees. Under the filibuster rules, senators wanting to vote on legislation or amendments must obtain 60 votes before they can move ahead with a vote, as opposed to the traditional majority.

Staffers with NARAL and other pro-abortion groups have raised the concerns with their pro-abortion friends in the Senate about the push by Senators Tom Harkin, Tom Udall, and Jeff Merkley. The lawmakers want to revise the filibuster rules to make it so lawmakers actually have to go to the Senate floor to filibuster — debate and talk — as opposed to threatening to do so without carrying through with the endless debate...