“Make room in your life for people who can say no to you. Keep them close.”
I get why Fitz dumped Mellie. He SAID why. He can't support her for president. When Fitz is faced with a dilemma, he does what good presidents, whose decisions have weight do. He thinks about it and he gets advice from qualified people. Olivia, Cyrus and sometimes even Mellie. He would NEVER hand over a list of strangers to another stranger without finding out WHY. Mellie is reckless and callous, and since he can no longer support her career, why stay together? The 'partnership' is over.