"The United States Senate just rewrote the treaty provision of the Constitution," he exclaimed. "This may be over the heads of most commentators … but it's not over my head, and it won't be over yours."
He said under the Constitution, the president has the power to negotiate treaties, and they are approved "provided two-thirds of the senators present concur."
He said such a supermajority (67 votes) was called for by the nation's Founders because they believed that leaving such decisions to a single person or a single body wasn't responsible.
"Alexander Hamilton tells us" that joint possession of such power provides the greater prospect of success, he said.
Under the proposed legislation, Congress can review the president's deal with the radical Islamists and can reject it with a 60-vote margin. But Obama then can veto it, and it would take a 67-vote total to overturn the veto.
"We've turned the treaty provision on its head," Levin said. "Instead of requiring two-thirds of the senators present to approve, this bill explicitly" demands 67 votes to stop the president.
"You need 67 votes to override a presidential veto to undo what Obama's done," he said. "Now we need a supermajority to override '