Jen Psaki breaks down why Donald Trump wants to tank the Senate immigration deal. Psaki argues, "Trump's fearmongering about immigration will continue all the way into November and voters will need to be reminded that Republicans had a chance to do something about border security. And Donald Trump wouldn't let them."  » Subscribe to MSNBC: youtube.com/msnbc Follow MSNBC Show Blogs MaddowBlog: msnbc.com/maddowblog ReidOut Blog: 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: msnbc.com Su...