Question: Why is impeachment in the United States an example of a supermajority vote? Need Assignment Help? Group of answer choices Both the House of Representatives and Senate must participate with two-thirds of the votes. A majority vote is needed in the House, but a two-thirds vote is needed in the Senate to convict. Supermajority implies a vote of 50 percent plus 1, which is the political standard. Two-thirds of members of Congress must call for elections to remove the Speaker of the House.