Democrats have retained the governor's offices in New York and Pennsylvania.
New York Gov. Andrew Cuomo defeated Republican Marc Molinaro on Tuesday to win election to a third, four-year term. No Republican has won a gubernatorial race there since 2002.
In Pennsylvania, Gov. Tom Wolf won a second term by turning back Republican challenger Scott Wagner.
Wolf's victory will ensure Democrats have a role in the next round of congressional redistricting after the 2020 Census.
Redistricting has been a hot topic in Pennsylvania, where the state Supreme Court earlier this year threw out the congressional maps drawn by the Republican-led state Legislature after the 2010 Census. The high court ruled the boundaries were an unconstitutional partisan gerrymander and ordered new districts for this year's elections.
EXPLORE: Live election data and the shifting balance of power in Congress