Complex sentence: Tenney ran unsuccessfully for the Republican nomination for the U.S. Senate in 1944 and in 1949, the year he was removed from the chairmanship of his committee in 1949, he ran for mayor of Los Angeles, placing fifth.
Split into simpler sentences: Tenney ran unsuccessfully for the Republican nomination for the U.S. Senate in 1944 and in 1949, the year he was removed from the chairmanship of his committee. In 1949, he ran for mayor of Los Angeles, placing fifth.