Sen. Elizabeth Warren of Massachusetts, a potential 2020 White House contender, is among a group of five Democratic lawmakers who have easily won re-election to the Senate.

Sens. Chris Murphy of Connecticut, Ben Cardin of Maryland, Tom Carper of Delaware and Sheldon Whitehouse of Rhode Island also won. They were heavy favorites in their races.

Warren has generated considerable speculation about a possible run for the White House in 2020, recently saying she’d take a “hard look” at a presidential bid after the Senate race was over.

Murphy won a second term after amassing a fundraising war chest that was 100 times larger than his opponent’s.

Meanwhile, Carper won his fourth term. He has never lost an election during four decades in politics.

Cardin and Whitehouse both won third terms.

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