CNN Republican Debate at the University of Miami.
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Donald Trump pressed for specifics of his worldview
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2016 Republican Presidential Debates 32 videos
CNN Republican Debate at the University of Miami.
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Donald Trump pressed for specifics of his worldview
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Ted Cruz: Trump hand-raising pledge 'exactly backwards'
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CNN Republican Debate at the University of Miami.
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Should the candidate with the most delegates win?
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CNN Republican Debate at the University of Miami.
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Does it matter how the world sees the U.S.?
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CNN Republican Debate at the University of Miami.
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Marco Rubio: 'The climate is always changing'
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Republican Presidential candidate Donald Trump speaks during the CNN Debate in Miami on March 10, 2016.
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CNN Republican Debate at the University of Miami.
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Donald Trump, Marco Rubio spar over Cuba
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HOUSTON, TX - FEBRUARY 24: Republican presidential candidate U.S. Sen. Marco Rubio (R-FL) speaks during a campaign rally at the Marriott South at Hobby Airport on February 24, 2016 in Houston, Texas. The process to select the next Democratic and Republican Presidential candidates continues. (Photo by Joe Raedle/Getty Images)
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Marco Rubio participates in a debate sponsored by Fox News on March 3, 2016 in Detroit, Michigan.
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Republican presidential candidate, businessman Donald Trump, second from left, gestures as Sen. Marco Rubio, R-Fla., Sen. Ted Cruz, R-Texas, and Ohio Gov. John Kasich watch him a Republican presidential primary debate at Fox Theatre, Thursday, March 3, 2016, in Detroit
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Fox anchor challenges Trump on deficit plans
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Republican presidential candidate, businessman Donald Trump, second from left, gestures as Sen. Marco Rubio, R-Fla., Sen. Ted Cruz, R-Texas, and Ohio Gov. John Kasich watch him a Republican presidential primary debate at Fox Theatre, Thursday, March 3, 2016, in Detroit
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HOUSTON, TX - FEBRUARY 25: Republican presidential candidates Sen. Marco Rubio (R-FL) (L) and Ted Cruz (R-TX)(R) listen as Donald Trump answers a question during the Republican presidential debate at the Moores School of Music at the University of Houston on February 25, 2016 in Houston, Texas. The debate is the last before the March 1 Super Tuesday primaries. (Photo by Michael Ciaglo-Pool/Getty Images )
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HOUSTON, TX - FEBRUARY 25: Donald Trump (R) and Sen. Marco Rubio (R-FL) talk over each other at the Republican presidential debate at the Moores School of Music at the University of Houston on February 25, 2016 in Houston, Texas. The debate is the last before the March 1 Super Tuesday primaries. (Photo by Michael Ciaglo-Pool/Getty Images )
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HOUSTON, TX - FEBRUARY 25: Donald Trump (R) and Sen. Marco Rubio (R-FL) talk over each other at the Republican presidential debate at the Moores School of Music at the University of Houston on February 25, 2016 in Houston, Texas. The debate is the last before the March 1 Super Tuesday primaries. (Photo by Michael Ciaglo-Pool/Getty Images )
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Five Republican presidential candidates are in Houston for a final showdown before Super Tuesday: the biggest voting day so far, when 13 states including Texas pick their Republican nominee.

Four of the candidates have a shared goal on the CNN debate stage: Stop Donald Trump.

Trump heads into the March 1 contests on a roll after three consecutive state wins. The two men who will flank him on the stage – Sen. Ted Cruz and Sen. Marco Rubio – so far have been unable to step out of Trump’s shadow.

Gov. John Kasich is starting to come under pressure to quit the race from establishment Republicans who favor Rubio. Ben Carson rounds out the debate, but his poll numbers so far have failed to take off.