U.S. Sen. Marco Rubio, R-Fla., continued his fight for student loan reform on Wednesday. Rubio announced he was backing a bill from U.S. Sen. Angus King, I-Maine, and U.S. Sen. Richard Burr which would streamline federal student loan repayment. The bill also has the support of U.S. Sen. Lamar Alexander, R-Tenn., U.S. Sen. Susan Collins, R-Maine, and U.S. Sen. Mark Warner, R-Va. Rubio and Warner teamed up last year in pushing a bill reforming student loan repayments based on income, but the King-Burr proposal would also include set repayment rates as well.