Class 2 US Senate seats during the 2008,2014,and 2020 elections.
In 2008(Obama Democratic wave)
Democrats picked up
1)AK(Stevens-R/Begich-D)
2)CO(Allard-R/Udall-D)
3)MN(Coleman-R/Franken-D)
4)NH(Sununu-R/Shaheen-D)
5)NM(Domenici-R/Udall-D)
6)NC(Dole-R/Hagan-D)
7)OR(Smith-R/Merkley-D)
8)VA(J Warner-R/M Warner-D)
In 2014(Republican wave)
Democrats lost
1)AK(Begich-D/Sullivan-R)
2)AR(Pryor-D/Cotton-R)
3)CO(Udall-D/Gardner-R)
4)IA(Harkin-D/Ernst-R)
5)LA(Landrieu-D/Cassidy-R)
6)MT(Baucus-D/Daines-R)
7)NC(Hagan-D/Tillis-R)
8)SD(Johnson-D/Rounds-R)
9)WV(Rockefeller-D/Moore Capito-R)
In 2020(Anti Trump/Pro Biden wave)
Democrats lose
-1)AL(Jones-D/Tuberville-R)
Democrats gain
0)AK(Sullivan-R/Gross-D)
1)AZ special(McSally-R/Kelly-D)
2)CO(Gardner-R/Hickenlooper-D)
3)GA regular(Perdue-R/Ossoff-D)
4)GA special(Loeffler-R/Warnock-D)
5)IA(Ernst-R/Greenfield-D)
6)KS(Roberts-R/Bollier-D)
7)KY(McConnell-R/McGrath-D)
8)ME(Collins-R/Gideon-D)
9)MS(Hyde Smith-R/Espy-D)
10)MT(Daines-R/Bullock-D)
11)NC(Tillis-R/Cunningham-D)
12)SC(Graham-R/Harrison-D)
13)TN(Alexander-R/Mackler-D)
14)TX(Cornyn-R/Hegar-D)