This tweet by AOC was fabricated. It does not appear on her twitter feed or databases that track deleted tweets. She confirmed the tweet is not real.
However, an investigation into the tweet revealed that there was no evidence of the congresswoman posting such a message on her Twitter. Archived versions of her account from the day it was allegedly posted don’t have any evidence of the tweet. Additionally, databases that track deleted tweets by politicians also don't reveal evidence of her posting that tweet. The congresswoman's office also revealed that the tweet is fake and reported it on Facebook.