 It also spelled out a process to remove an unfit executive. Here's how it works. It all starts with the vice president. He or she must declare the president to be unfit to serve, and at least half of the 15-person cabinet must agree. And then the president is out. Unless he or she says they're not. Then it goes to Capitol Hill. Only then is when the Congress gets involved. It takes a two-thirds vote in both the House and Senate to strip the president of his post. Then the vice president becomes acting president.