The Senate was completing debate on the Treaty of Versailles. That was the World War One peace agreement that contained Wilson's plan for the league. It seemed clear the Senate would reject the treaty. Too many Senators feared the United States would lose some of its independence and freedom if it joined the league.
The leader of Wilson's political party in the Senate, Gilbert Hitchcock, headed the administration campaign to win support for the treaty. Hitchcock told the president the situation was hopeless. He said the Senate would not approve the treaty unless several changes were made to protect American independence. If the president accepted the changes, then the treaty might pass.
Wilson refused. He would accept no compromise. He said the treaty must be approved as written. The treaty was defeated. From his sick bed, he wrote a letter to the other members of the Democratic Party. He urged them to continue debate on the League of Nations. He said a majority of Americans wanted the treaty approved.
The Senate Foreign Relations Committee agreed to re-open discussion on the treaty. It searched yet again for a compromise.
（the Treaty of Versailles：ベルサイユ条約）