Control of both chambers of Congress hung in the balance Wednesday morning after Democrats showed surprising strength in key battleground races on Tuesday. Too many races remained uncalled to project which party will control the House or Senate.

Democrat John Fetterman is projected to win the race for Senate in Pennsylvania, defeating Republican Mehmet Oz. Other Senate races remain uncalled in: Wisconsin, between Sen. Ron Johnson (R) and Democrat Mandela Barnes; Georgia, between Sen. Raphael G. Warnock (D) and Herschel Walker (R); Arizona, between Sen. Mark Kelly (D) and Republican Blake Masters; and Nevada, between Sen. Catherine Cortez Masto (D) and Republican Adam Laxalt.

Here’s what to know

• Republicans J.D. Vance of Ohio and Rep. Ted Budd of North Carolina were projected to win their Senate races, fending off Democratic efforts to flip those seats. Sens. Maggie Hassan (N.H.), Michael F. Bennet (Colo.) and Patty Murray (Wash.) were projected to win reelection, keeping those seats in Democratic hands.


• In a strong night for incumbent governors, Michigan’s Gretchen Whitmer (D) was projected to win a second term. Democrats Kathy Hochul of New York, Michelle Lujan Grisham of New Mexico and Janet Mills of Maine, along with Georgia Republican Gov. Brian Kemp, were also projected to win. In Pennsylvania, Democrat Josh Shapiro was projected to win, defeating Republican Doug Mastriano.