WASHINGTON — Democrats’ sweep of the biggest races in Tuesday’s off-year elections, including a California ballot measure to redraw that state’s congressional lines to give the party up to five more seats in the U.S. House, gave the party new confidence heading into the midterm elections next year.

Democrats proclaimed the performances of Govs.-elect Mikie Sherrill in New Jersey, Abigail Spanberger in Virginia and New York City Mayor-elect Zohran Mamdani showed voters’ rejection of President Donald Trump.

“The election results were not vague,” Senate Minority Leader Chuck Schumer told reporters Wednesday. “They were not unclear. They were a lightning bolt: Trump, America doesn’t like what you’re doing. Change course.”

Republicans won control of the White House and both chambers of Congr

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