At this point there is no reason to even keep Biden except literally wanting to lose to Trump and/or having the Genocide supporter in charge after the election.

I have consistently opposed Biden but even for liberals that want to play the system, endorsing Biden as the candidate when they can swap him out is contradictory to everything they stand for.

https://www.timesofisrael.com/where-does-bernie-sanders-stand-on-israel-2/

In a lengthy interview with Rolling Stone magazine published in November 2014, Sanders said that if elected president, he would “support the security of Israel, help Israel fight terrorist attacks against that country and maintain its independence,” while also vowing to maintain “an evenhanded approach to that area.”

https://www.jpost.com/Diaspora/Where-does-Bernie-Sanders-the-Jewish-candidate-for-president-stand-on-Israel-412448

“Has Israel overreacted? Have they bombed UN facilities? The answer is yes, and that is terribly, terribly wrong,” Sanders said. “On the other hand – and there is another hand – you have a situation where Hamas is sending missiles into Israel – a fact – and you know where some of those missiles are coming from. They’re coming from populated areas; that’s a fact. Hamas is using money that came into Gaza for construction purposes – and God knows they need roads and all the things that they need – and used some of that money to build these very sophisticated tunnels into Israel for military purposes.”

This has been the Sanders response to Israel for decades. He’s a reliable vote on more US funding for military support. He routinely endorses resolutions favoring the continued “existence of Israel” in the form of occupied Palestinian lands. He talks about a “Two State Solution” while defending the right of Israel soldiers to respond with brutality and barbarity whenever they are challenged.

Ilhan Omar and Rashida Tlaib this guy ain’t. He votes as staunchly in favor of Israel as Ted Cruz or JD Vance.