It’s not just the Democrats in D jerseys.
Alexander, Corker, Flake, Gardner, Graham, Hatch, Heller, Hoeven, Murkowsky, McCain, Rubio, Burr, Tillis, Portman, McConnell, Thune, Cornyn, Cochran, Isackson, Blunt, Johnson, Toomey, Capito, Rounds, Fischer, Collins, Wicker, Sasse are all Democrats in R jerseys.
I’d say they are members of the Federal Government Party - as are many Democrats. The Federal Government Party, just like the Communist wing of the Democrat Party, is adamantly opposed to the mere existence of Donald Trump - leaving perhaps 25% of the Senate as Trump allies.