Greg Corombos of Radio America and Jim Geraghty of National Review review the three most intense exchanges from Thursday’s Republican presidential debate. They praise Ted Cruz for his defense of his eligibility to be president against accusations to the contrary by Donald Trump. They also conclude Trump got the better of Cruz on the squabble over New York values by invoking the spirit following 9/11. And they discuss the dueling flip-flop charges over immigration and more between Cruz and Marco Rubio.