There is no way for there to be “unity” (which means that people like AOC bend, not those to her right and it doesn’t apply to people like Pelosi and Schumer, witness over a third of the Democrats supporting Hogan in Maryland over Jealous) in the Democratic Party as it is constructed unless AOC gives in. She cannot share the party with people like Pelosi, work within the confines Pelsoi wants to work in and within a policy framework that Pelosi finds acceptable, if AOC wants to hold onto to her policy stances and priorities. Pelosi is in many ways more opposed to her on policy than the Republicans. Pelosi is just as much of an obstacle to progressive change as anyone on the right. As I have said before, she eulogized Pete Peterson on the freaking House floor, which isn’t tons different than voluntarily eulogizing the Koch Brothers or Robert Spencer. Peterson was instrumental in spreading lies about deficits, debt and the solvency of programs like Social Security. Pelosi attended his functions, believes his absolute bullshit, and has committed her own party to austerity. She goes on TV and brags about being good at taking in bribes, used the DCCC to undermine the left in primaries, has strongly argued against changing policy and leadership in that party, and has absolutely no integrity at all. AOC is going to have to try to work with the Republicans too. Why should we assume that the right, being defenders of the system as is and their top donors, should be treated any differently than Pelosi? You work with them when you can, but you come prepared to fight them, and expect to.
Look at polls, she is deeply unpopular, and she has been a disaster as a leader. She refuses to step down because of how it would impact her. There is no reasoning with people like her any more than there is Trump. She just needs to be defeated and thrown the hell out, and the same is true of everyone like her in her crappy party.