Should Republicans Thank Trump?

Jacob Weisberg talks to Sam Tanenhaus about why Trump is exactly the reckoning the GOP needed. Trumpcast is brought to you by MeUndies. MeUndies makes the world’s most comfortable underwear in a variety of styles and patterns. Head to MeUndies.com/TRUMPCAST to get free shipping and 20 percent off your first order. Learn more about your ad choices. Visit megaphone.fm/adchoices