Hour 1: GOP Republican Debate in Houston

Republican debate: Marco Rubio swings at Donald Trump. Marco Rubio was on fire Thursday night. For weeks, he's resisted taking on Donald Trump, who has eviscerated other Republicans who threatened his status as the front-runner. To learn more about how CNN protects listener privacy, visit cnn.com/privacy Learn more about your ad choices. Visit podcastchoices.com/adchoices