I got the party IDs and made a few changes:
AK Murkowski (R) - likely retire, if not will surely be primaried
AL Shelby (R) - switched to Republican party in 1994 - likely retire - age 86.
AR Boozman (R)
FL Rubio (R) - retired in 2016 to run for president, then after failure ran again.
GA Loeffler (R) - Jan 5th will decide her fate.
IA Grassley (R) - elected in 1980 - likely retire.
ID Crapo (R)
IN Young (R) - just elected in 2016.
KS Moran (R) - will probably run and be reelected.
KY Paul (R) - will likely run and be reelected.
LA Kennedy (R) - One of the good one—a Democrat turned Republican.
MO Blunt (R) - may retire.
NC Burr (R) - already announced retirement.
ND Hoeven (R) - pretty worthless, but will likely get reelected.
OH Portman (R) - totally worthless, hope he retires.
OK Lankford (R) - semi-worthless, will likely get reelected.
PA Toomey (R) - Mr. Gun Control - already announced retirement.
SC Scott (R) - likely to be reelected.
SD Thune (R) - McConnell’s hand-selected stooge/successor.
UT Lee (R) - totally worthless, needs to be replaced.
WI Johnson (R) - pretends to be conservative.
AZ Kelly (R) - just elected to serve out McCain’s term.
CA Padilla (D) (Harris’ seat) - can a republican win in CA?
CO Bennett (D) - Gardner just lost in CO. Is CO going blue?
CT Blumenthal (D) - hope “Skeketir” retires, but he won’t.
HI Schatz (D) - an enigma, so will be reelected.
IL Duckworth (D) - just elected in 2016.
MD Van Hollen (D) - just elected in 2016.
NH Hassan (D) - a solid republican could take her out.
NV Cortez Masto (D) - Don’t see any chance of defeating her.
NY Schumer (D) - in congress since 1981, Senate since 1999, could be primaried by AOC.
OR Wyden (D) - old lispy will likely run again and be reelected.
VT Leahy (D) - will retire or die.
WA Murray (D) - this dope will be reelected.
22 Republicans
12 Democrats
That one is a Democrat.