WASHINGTON (AP) — Republicans are maneuvering to short-circuit an effort by Democrats on the National Labor Relations Board to approve rules that would quicken the pace of union elections.

The GOP member of the labor board is threatening to resign his post, which would deny the board a quorum and quash the entire process. At the same time, the House is poised Wednesday to approve a GOP bill aimed at short-circuiting moves they consider anti-business. That measure is unlikely to go anywhere in the Senate.

The developments are the latest sign of how intensely business groups are opposing any moves that could help organized labor make new inroads at companies that have long opposed unions.