 Complete the following phrase:  In September 1932, Colorados governor appointed Walker to fill a vacancy in the United States Senate. He ran in the special election to complete the term, but was defeated by Republican nominee Karl C. Schuyler, who was sworn in to office in December. He continued to own and publish the Daily Sentinel and was a delegate to the Democratic National Conventions in 1936, 1940, 1944, 1948, and 