Entering the 1912 Democratic National Convention, Clark had won the backing of a majority of the delegates, but lacked the necessary two-thirds majority to win the presidential nomination. After dozens of ballots, Woodrow Wilson emerged as the Democratic presidential nominee, and went on to win the 1912 presidential election. Clark helped Wilson pass much of his progressive agenda but opposed U.S. entry into World War I. The 1920 House elections saw the defeat of numerous Democrats, including Clark. He died the following March, two days before he would have left office.