I don't think he's making those decisions on his own.
My guess is Pelosi.
By right, most dems who ran on supporting Trump, like Drew Van Allen, should have bolted during impeachment like he did. Whatever the reason is that they didn't can't be good.
Some mayors in MN have bolted, so, hopefully there are fissures in the dem/DS power structure. West coast must be too heavily entrenched. Too afraid to buck Pelosi, Newsom and Harris, maybe.