Mika Brzezinski advised Chris Christie and other Republicans that have endorsed Trump to backtrack and rescind their endorsement on Friday's broadcast of MSNBC's <i>Morning Joe</i>. Brzezinski also addressed the friendly-turned-sour relationship the morning show had with the presumptive Republican presidential nominee. "We've always been friendly with him," Brzezinski admitted. "Absolutely radio silent since this judge thing, because he cannot be told he is wrong. And I will say that you are wrong when one is wrong, as you know (looks to host Joe Scarborough), and you will too. This is wrong. It shouldn't be done. You should apologize. Like, I can't get over it. I'm sorry. And by the way, nor can a lot of people." "This campaign is going downhill. I predict the next polls are even worse. This guy is literally deep-sixing his campaign," Brzezinski prognosticated. The duo then talked about how the "phone is going crazy" from Republicans who are reaching out to the MSNBC hosts to let them know they are stunned. "Chris Christie, walk away. Put down your pens, put down your bag, take your jacket off put it in the back of a chair and walk out of that campaign before you ruin your future," Brzezinski advised. "What's wrong with you!" Brzezinski exclaimed.