On Tuesday, insurgent challengers beat out their opponents in races across the country by running on bold left platforms.

If members of the Democratic Party establishment weren’t already worried, after Tuesday night, they should be. In primaries across the country, at least eight candidates running on explicitly progressive platforms won out, including open socialists and political newcomers who took out longtime incumbents.

These victories are proof that the recent successes of left challengers are no fluke. Rather, the wins show that voters who are tired of the type of milquetoast, means-tested policies pushed by centrist Democrats are willing to embrace candidates running on bold, redistributive policies. And far from being too far left to win, these candidates have the political winds at their backs.

In the Pittsburgh area, two members of the Democratic Socialists of America (DSA), Summer Lee and Sara Innamorato, won hotly contested races for the Pennsylvania statehouse.