Biden (or his handlers) will encourage, equip and embolden Iran. That will make peace in the ME impossible.
Every nation in the world is secretly laughing at the US right now.
The enemies of the US will seize this moment to settle old scores.
Expect chaos of all kinds—and big trouble for US troops abroad anywhere.
The best historical example I can think of is the few few months of the JFK administration.
While the mass media insisted he was an amazing President, JFK lurched from crisis to crisis, and almost got the whole planet burnt to a crisp.