Lea was elected to the Senate by the
Tennessee General Assembly in 1911; after 10 unsuccessful ballots, his name was introduced as a compromise choice, and he was selected on the 11th ballot. He was an enthusiastic supporter of most of the
progressive policies of Democratic
President Woodrow Wilson, a fellow native of the
South. Elected president in 1912, Wilson was only the second
Democrat to gain the office since the end of the
Civil War. During the
63rd Congress, Lea was chairman of the Senate Committee on the Library (of Congress). Socially progressive but fiscally conservative, Lea actively supported lowering tariffs, the creation of the
Federal Reserve System, the regulation of major corporations, and the breaking up of trusts. He also supported women's suffrage and a national prohibition amendment. He allied with
Robert La Follette and supported his seaman's act. He approved of the
eight-hour day and opposed
child labor. In 1913, Lea began his most ambitious undertaking in the Senate when he attempted to launch a federal investigation of the railroads and political corruption in Tennessee. The investigation encouraged the railroads to cease distributing free passes as political favors, but the growing crisis of the First World War eventually overshadowed concerns about corruption, and the investigation was shelved. During Lea's term, the
Seventeenth Amendment changed the method of election of Senators from election by the
state legislatures to direct popular vote. Lea supported this measure. Lea contended for the 1916 Democratic nomination for the seat but was defeated by
Kenneth McKellar, a colleague of
Memphis political "boss" E. H. Crump. McKellar was re-elected to a total of six terms, and is to date Tennessee's longest-serving senator. Despite his lame duck status, Lea continued to work on the progressive agenda. He voted to confirm
Louis Brandeis to the Supreme Court, and supported a number of progressive measures in the Senate including immigration reform, the Shipping Act of 1916, and the
Revenue Act of 1916. ==World War I==