Photos:: Republican presidential candidates debate at the University of Miami

The four remaining Republican primary candidates Marco Rubio, Donald Trump, Ted Cruz, and John Kasich take part in a debate at the University of Miami.

Sen. Marco Rubio, left, and Donald Trump take part in the debate at the University of Miami.

Sen. Marco Rubio answers a question as Donald Trump listens during the Republican presidential debate at the University of Miami.

The four remaining Republican primary candidates -- from left, Marco Rubio, Donald Trump, Ted Cruz and John Kasich -- debate in Miami.

Donald Trump and Ted Cruz at the debate.

Ted Cruz speaks, flanked by Donald Trump and John Kasich.

Donald Trump on stage.

John Kasich answers a question.

Donald Trump speaks as Marco Rubio, left, and Ted Cruz, right, listen during the debate at the University of Miami.

Ted Cruz speaks.

Marco Rubio speaks at the debate in his home state of Florida, which holds its primary next week.

The last four Republican presidential candidates debate in Miami.

The candidates take the stage before the debate at the University of Miami.

The candidates stand together during the national anthem before their debate.

The stage is set for the Republican presidential debate.

Florida Gov. Rick Scott withheld his endorsement until after the Florida primary.   (Alan Diaz / Associated Press )