The 2026 Senate elections will determine whether Republicans keep their majority or Democrats claw back control. Thirty-three Class II seats plus specials in Ohio and Florida are on the ballot.

The math

Republicans hold 53 seats; Democrats hold 47. Democrats need a net gain of four to reach 51 (Vice President tie-breaking is less relevant when the White House is not on this ballot, but 50–50 with a Democratic VP in 2028 would matter for organizing, for 2026, target 51).

Democratic defense

  • Georgia: Jon Ossoff (D) vs. Mike Collins (R). Trump state; Ossoff has led in several August polls.
  • Michigan: Open seat. Abdul El-Sayed (D) vs. Mike Rogers (R). Republicans see a prime pickup; Democrats argue El-Sayed can energize base voters.

Republican defense

  • Maine: Susan Collins (R) vs. Troy Jackson (D). Collins has won tough races before; Jackson entered after a disrupted Democratic primary.
  • North Carolina: Open seat. Roy Cooper (D) vs. Michael Whatley (R). Widely viewed as Democrats' best flip opportunity.

Secondary targets

Iowa, Ohio, Texas, and Alaska have drawn attention from Democrats seeking a fourth seat if Michigan or Georgia slips. Florida's special election and Ohio's open seat add complexity to any majority calculus.

Ratings from the Cook Political Report and Inside Elections label most races as of August 2026; revisit as October polls and fundraising reports arrive.