<P> In 2016, the Constitution of Colorado was amended to require a 55% majority to pass new constitutional amendments by popular vote . </P> <P> Related concepts regarding alternatives to the majority vote requirement include a "majority of the entire membership" and a "majority of the fixed membership". </P> <P> A majority of the entire membership is a voting basis that requires that more than half of all the members of a body (including those absent and those present but not voting) vote in favor of a proposition in order for it to be passed . In practical terms, it means an absence or an abstention from voting is equivalent to a "no" vote . It may be contrasted with a majority vote which only requires more than half of those actually voting to approve a proposition for it to be enacted . An absolute majority may also be the same as a majority of the entire membership, although this usage is not consistent . </P> <P> In addition, a supermajority could be specified in this voting basis, such as a vote of "two - thirds of the entire membership". </P>

A 2/3 vote in each house of congress