WASHINGTON, DC – The United States Congress has now given President Barack Obama so-called fast-track negotiating authority to conclude the Trans-Pacific Partnership (TPP), the proposed mega-regional free-trade agreement among the US and 11 other countries. But Obama’s victory was not an easy one: Members of his own Democratic Party overwhelmingly opposed fast-track authority, which limits Congress to a single up-or-down vote on finished trade agreements, thereby ruling out amendments.