Last time a Democrat won a US Senate Election in by year.

1932(KS-McGill-D)
1970(UT-Moss-D)
1970(WY-McGee-D)
1974(ID-Church-D)
1982(MS-Stennis-D)
1988(TX-Bentsen-D)
1990(TN-Gore-D)
1990(OK-Boren-D)
1992(KY-Ford-D)
1998(SC-Hollings-D)
2006(NE-Nelson-D)
2008(AK-Begich-D)
2008(AR-Pryor-D)
2008(IA-Harkin-D)
2008(LA-Landrieu-D)
2008(NC-Hagan-D)
2008(SD-Johnson-D)
2012(FL-Nelson-D)
2012(IN-Donnelly-D)
2012(MO-McCaskill-D)
2012(ND-Heitkemp-D)
2017 special(AL-Jones-D)