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Marco Rubio endorses presidential on-the-job training

Marco Rubio is convinced that Donald Trump isn't prepared for the presidency, but the Florida Republican continues to support Trump's candidacy anyway.

Republican presidential candidate Marco Rubio and rival candidate Donald Trump argue at the same time at the debate in Detroit, Mich., March 3, 2016. (Photo by Jim Young/Reuters)
Republican presidential candidate Marco Rubio and rival candidate Donald Trump argue at the same time at the debate in Detroit, Mich., March 3, 2016.REUTERS

Steve Benen is a producer for "The Rachel Maddow Show," the editor of MaddowBlog and an MS NOW political contributor. He's also the bestselling author of "Ministry of Truth: Democracy, Reality, and the Republicans' War on the Recent Past."