Leading the lobbying effort for the bill has been AIPAC, the American Israel Public Affairs Committee. AIPAC has been accused of threatening lawmakers who oppose the legislation. Democratic Congresswoman Betty McCollum of Minnesota said an AIPAC activist warned her chief of staff that her “support for terrorists will not be tolerated.” McCollum said she is no longer allowing representatives from AIPAC in her office or to meet with her staff. McCollum has said she opposes the bill because it could destabilize the situation and heighten chances of a humanitarian crisis.