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 )