2008 was the last time Democrats made big gains in the US Senate. [View all]

[nkpolitics1212]

Republican US Senators that lost re-election in 2008
Stevens(R-AK)
Coleman(R-MN)
Sununu(R-NH)
Dole(R-NC)
Smith(R-OR)
Republican US Senators that retired in 2008 and were replaced by a Democrat.
Allard(R-CO)
Domenici(R-NM)
Warner(R-VA)
2020 is going to be the year Democrats make net gain of 8 seats in the US Senate.
Republican US Senators that will lose re-election in 2020.
McSally(R-AZ)
Gardner(R-CO)
Perdue(R-GA)
Ernst(R-IA)
McConnell(R-KY)
Collins(R-ME)
Tillis(R-NC)
Retiring US Senators that will be replaced by a Democrat in 2020.
Roberts(R-KS)
Alexander(R-TN)