Senate rankings: 5 seats most likely to flip

Sen. Joe Manchin’s (D-W.Va.) decision to retire has made the Senate landscape in 2024 even more complicated for Democrats.

The party was already facing an uphill slog to hold on to its Senate majority, as it prepared to protect seats in West Virginia, Montana and Ohio — three states where the GOP nominee for president will be heavily favored.

Manchin’s name on the ballot suggested a competitive race. Without him, the Senate seat seems wrapped for the GOP as a gift.

Losing the state would leave no room for another loss for...