Sen. John McCain, Arizona Republican, walks near the floor of the Senate on Capitol Hill in Washington on Saturday, Dec. 18, 2010, during a rare Saturday session to finish the year's legislative business. The Senate voted to advance legislation that would overturn the military ban on openly gay troops known as "don't ask, don't tell." (AP Photo/Alex Brandon)

Photo by: Alex Brandon

Sen. John McCain, Arizona Republican, walks near the floor of the Senate on Capitol Hill in Washington on Saturday, Dec. 18, 2010, during a rare Saturday session to finish the year's legislative business. The Senate voted to advance legislation that would overturn the military ban on openly gay troops known as "don't ask, don't tell." (AP Photo/Alex Brandon)