Ted Cruz and Marco Rubio Clash Harshly, Filling Void on G.O.P. Debate Stage. Presidential Election of 2016, Debates (Political), Martin, Jonathan, Cruz, Ted, Rubio, Marco, Trump, Donald J, Iowa, Primaries and Caucuses, Bush, Jeb, Christie, Christopher J, Republican Party, Fox News Channel, Kasich, John R, Carson, Benjamin S, Paul, Rand