MS NOW

Marco Rubio still stumbling on his signature issue

Last week, John Kerry made Rubio look foolish on matters of foreign policy. This week, Rubio made himself look bad all on his own.

Marco Rubio
U.S. Sen. Marco Rubio (R-FL) speaks during the National Rifle Association Annual Meeting Leadership Forum on April 25, 2014 in Indianapolis, Indiana.Getty Images

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."