Two open-seats in the upper Midwest could be key to the Democratic Party’s efforts to win the House this fall.

Democrats already have hand-picked their candidates. But GOP primaries on Tuesday will settle whom those candidates will face — and their chances in November.

Republicans have long held Minnesota’s 2nd District and Wisconsin’s 8th District. But the retirements of Reps. John Kline and Reid Ribble have made these seats competitive in November.

Kline and Ribble each have a favorite in the primaries. They hope that their choices can over perform Donald Trump in two districts that could be tough for the GOP presidential nominee to win.