Special coverage: South Carolina Republican presidential primary

Rachel Maddow and her prime time MSNBC colleagues discuss the viability of Donald Trump's candidacy as he fails to drive Nikki Haley out of the race even as he continues to win state contests. Want more of Rachel? Check out the "Rachel Maddow Presents" feed to listen to all of her chart-topping original podcasts. To listen to all of your favorite MS podcasts without ads, sign up for MS NOW Premium on Apple Podcasts. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.