Democrats

CA-9(McNerney-D is retiring rather than challenging Harder-D)
CA-42(Roybal Allard-D and Lowenthal-D are both retiring. Both will be replaced by 1 Democrat.)
FL-2(Lawson-D loses to Dunn-R)
GA-7(Boudreaux-D lost to McBath-D in the primary.)
IL-6(Casten-D or Newman-D will lose in the primary.)
MI-11(Levin-D or Stevens-D will lose in the primary.)
MI-12(Jones-D is retiring rather than challenging Tlaib-D)
NY-12(Maloney-D or Nadler-D will lose in the primary.)

Democrats could end up winning
NY-19(Democrats could win that seat in the special election.)
OH-13
PA-7