From one anonymous Democrat quoted by the Hill:

“What I have recommended to the New York delegation is that you find her a primary opponent and make her a one-term congressperson,” the Democratic lawmaker, who requested anonymity, told The Hill. “You’ve got numerous council people and state legislators who’ve been waiting 20 years for that seat. I’m sure they can find numerous people who want that seat in that district.”

I agree with this assessment from mistermix:

If AOC has a superpower, it is pissing off old school politicians who apparently are scared of popular ideas like restoring a 70% marginal tax rate. I’d love to see a person like the back bencher quoted in this article take a run at AOC - it would be almost as fun as watching a rich wanker like Howard Schultz smear poop all over himself by calling her ideas “un American”.