Democrats’ hopes of securing control of the Senate next year begin with defending a freshman from a Southern swing state that Donald Trump narrowly carried in 2024.
And Republican efforts to maintain their Senate majority center on a longtime incumbent who has managed to hang on despite representing a state that leans blue.
A year out from Election Day, Georgia’s Jon Ossoff, a Democrat seeking his second term, and Maine’s Susan Collins, a Republican seeking her sixth, top our list of the most vulnerable senators of 2026.