’It’s a big deal’: MSNBC panel reacts to Taylor Swift’s endorsement of Kamala Harris

An MSNBC panel reacts to the magnitude and influence of Taylor Swift’s endorsement of Kamala Harris following Harris’ dominating performance in her first presidential debate against Donald Trump. » Subscribe to MSNBC: Download our new MSNBC app for the latest breaking news and daily headlines at a glance: Follow MSNBC Show Blogs MaddowBlog: ReidOut Blog: MSNBC delivers breaking news, in-depth analysis of politics headlines, as well as commentary and informed perspectives. Find video clips and segments from The Rachel Maddow Show, Morning Joe, The Beat with Ari Melber, Deadline: White House, The ReidOut, All In, Last Word, 11th Hour, and Alex Wagner who brings her breadth of reporting experience to MSNBC primetime. Watch “Alex Wagner Tonight” Tuesday through Friday at 9pm Eastern. Connect with MSNBC On