Which key battles could shape outcome of 2026 US midterms?

All 435 seats in the US House of Representatives, 35 Senate seats and 39 governorships will be up for grabs in the 2026 midterms. Several closely contested Senate races could influence the balance of power in Washington, with key contests in Georgia, North Carolina, Ohio, Texas and Alaska. Other closely watched contests are underway in Maine, New Hampshire and Iowa.