Turning to moderator Chris WallaceChristopher (Chris) WallaceThe Hill's 12:30 Report: Former Ukraine envoy offers dramatic testimony Chris Wallace on Yovanovitch testimony: 'If you're not moved, you don't have a pulse' Bret Baier says Trump tweet added an article of impeachment in real time MORE, Cruz said, "I would note that the last four questions have been, 'Rand, please attack Ted. Marco, please attack Ted. Chris, please attack Ted. Jeb, please attack Ted.' 
 
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"Gosh, if you guys ask one more mean question, I may have to leave the stage," the Texas senator added, in a shot at front-runner Donald Trump's decision to withdraw from the Republican debate over his battle with Fox News host Megyn Kelly.
 
Cruz, who is vying with Trump to win Monday's Iowa caucuses, has been criticizing the billionaire as being too thin-skinned to answer tough questions and too arrogant to submit himself before Iowa voters at Thursday night's Des Moines debate.
 
After Cruz finished his speech, rival Marco Rubio said: "Don't worry. I'm not leaving the stage, no matter what you ask me."