I, as someone who thinks Sanders should be gone, thinks it’s still to early to put a lot of stock in statements like this considering he’s polling fairly well, but:

Bernie Sanders, Bill de Blasio, and Tulsi Gabbard top the list of candidates Democratic voters have ruled out as they weigh their decision in the party’s primaries and caucuses. https://t.co/ahBL0UB0wY

— laynie (Elayne with a Y) (@LaynieR) May 9, 2019

Edit: The article does give data to the argument that not all of them will be around by the first debate.