If DC becomes a state, the maximum number of US Senate seats the Democrats will end up with is 58

[nkpolitics1212]

37)DC(Bowser-D)
38)DC(Fenty-D)
Bowser-D and Fenty-D served as Mayor of DC. citywide/statewide office.
39)HI(Schatz-D)
40)NY(Schumer-D)
41)CA(Padilla-D)
42)MD(Van Hollen-D)
43)CT(Blumenthal-D)
44)WA(Murray-D)
45)VT(Leahy-D)
46)IL(Duckworth-D)
47)OR(Wyden-D)
48)CO(Bennet-D)
49)NV(Cortez Masto-D)
50)AZ(Kelly-D)
51)NH(Hassan-D)
52)PA(Fetterman-D)
53)WI(Godlewski-D)
54)GA(Warnock-D)
55)NC(Beasley-D)
56)OH(Ryan-D)
57)IA(Axne-D)
58)FL(Demings-D)