Trump's endorsement braves election tests, but shows signs of weakness, with Marc Caputo and Brendan Buck

<p>Trump-endorsed candidates are soaring through primary elections, but a string of losses in competitive races puts into question whether — two years since leaving office — former President Trump's influence on his party is finally waning. NBC News National Political Reporter Marc Caputo and Brendan Buck, a former advisor to Republican House Speakers, join Chuck to discuss the GOP's complicated relationship with its former flagbearer.</p>