A look at the Democratic senators facing re-election in 2018 from states where President-elect Donald Trump won or nearly won on Election Day:
States Trump won, with margin of victory according to early and unofficial returns:
Tammy Baldwin, Wisconsin, Trump by 1 percentage point.
Sherrod Brown, Ohio, Trump by 9.
Bob Casey, Pennsylvania, Trump by 1.
Joe Donnelly, Indiana, Trump by 19.
Heidi Heitkamp, North Dakota, Trump by 36.
Joe Manchin, West Virginia, Trump by 42.
Claire McCaskill, Missouri, Trump by 19.
Bill Nelson, Florida, Trump by 1.
Jon Tester, Montana, Trump by 21.
States Democrat Hillary Clinton won narrowly:
Angus King, independent who aligns with Democrats, Maine, Clinton by 3.
Amy Klobuchar, Minnesota, Clinton by 2.
Tim Kaine, Virginia, Clinton by 5.