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HUNTSVILLE, AL - FEBRUARY 27:  Republican presidential candidate Sen. Marco Rubio (R-FL) speaks at a campaign rally at the Space and Rocket Center on February 27, 2016 in Huntsville, Alabama. Rubio is in Alabama trying to gain support in front of the Super Tuesday primaries which will be held on March 1st.  (Photo by Scott Olson/Getty Images)
HUNTSVILLE, AL - FEBRUARY 27:  Republican presidential candidate Sen. Marco Rubio (R-FL) speaks at a campaign rally at the Space and Rocket Center on February 27, 2016 in Huntsville, Alabama. Rubio is in Alabama trying to gain support in front of the Super Tuesday primaries which will be held on March 1st.  (Photo by Scott Olson/Getty Images)

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Is Rubio's attack against Trump too little too late?

Marco Rubio is jabbing Donald Trump from all angles. But has his attack strategy come too late to stop the Trump train?

Is Rubio's attack against Trump too little too late?

Marco Rubio is jabbing Donald Trump from all angles. But has his attack strategy come too late to stop the Trump train?