Isaac Arnsdorf, national political reporter for The Washington Post, talks with Ali Velshi about the as-yet impenetrable lead Donald Trump has secured over his Republican primary opponents, due in large part to supporters who concoct excuses for his failures and celebrate his disgraces. » Subscribe to MSNBC: https://www.youtube.com/msnbc Follow MSNBC Show Blogs MaddowBlog: https://www.msnbc.com/maddowblog ReidOut Blog: https://www.msnbc.com/reidoutblog 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 Online Visit msnbc.com: https://www.msnbc.com/ Subscribe to the MSNBC Daily Newsletter: https://link.msnbc.com/join/5ck/msnbc-daily-signup Find MSNBC on Facebook: https://www.facebook.com/msnbc/ Follow MSNBC on Twitter: https://twitter.com/MSNBC Follow MSNBC on Instagram: https://www.instagram.com/msnbc #MSNBC #GOP #Trump