Republican control of the U.S. Senate means new clout for Tennessee Senators Lamar Alexander and Bob Corker. Alexander easily turned back a challenge by Democrat Gordon Ball Tuesday. He is in line to become chairman of the Senate’s health, education, labor and pensions committee next year. Former Chattanooga Mayor Bob Corker, serving his 2nd term in the Senate, is set to chair the powerful foreign relations committee. Alexander says he ran for a 3rd term in Washington to fix the broken political system and move the country in a new direction. Corker, a frequent critic of the Obama administration’s foreign policy, says he hopes to end political gridlock. He says the country is often best governed when one party controls Congress while the other holds the White House.