Long thread by Drew Holden explaining why Fetterman is being treated with kid gloves and Feinstein is being thrown under the bus.
Long story short - Feinstein's replacement would be immediately appointed by Gavin Newsome, but Fetterman's replacement would be chosen in a special election if Fetterman cannot last at least through August of 2023. So, they can turn on Fetterman and start throwing him under the bus as long as he makes it to September 1, 2023 because then the Democrat governor of Pennsylvania can appoint his successor without a special election.
Thread master Drew Holden wonders why these two senators are not the same
http://twitchy.com/justmindy-313239/2023/05/17/thread-master-drew-holden-wonders-why-these-two-senators-are-not-the-same/
http://freebeacon.com/democrats/dianne-feinstein-john-fetterman/
The essential American soul is hard, isolate, stoic, and a killer. It has never yet melted. ~ D.H. Lawrence