Redistricting and a flood of departing incumbents are paving the way for more extreme candidates in this year’s midterm elections.

Driving the news: At least 19 House districts in 12 states are primed to attract such candidates — hard partisans running in strongly partisan districts — according to an Axios analysis of districts as measured by the Cook Political Report’s Partisan Voter Index (PVI).

They stretch across every region of the U.S., from Alabama to Michigan to California.

While a new generation of hard-right figures like Reps. Matt Gaetz of Florida and Marjorie Taylor Greene of Georgia has hardened the identity of the Republican Party in recent years, 12 of the 19 districts we’re watching favor Democrats.