WaPo:

From Texas to Oregon, competitive congressional districts are disappearing. As states finalize new borders ahead of the 2022 midterms, state legislatures are approving maps they hope will advantage one party in the coming struggle to control the narrowly held U.S. House.

In the 15 states that approved new congressional district maps as of Monday morning, the number of districts where the 2020 presidential margin was within five percentage points has fallen from 23 to just 10, according to a Post analysis. The new maps in those states have already netted a double-digit increase in solidly Republican seats compared with previous maps there. The completion of maps in more states will provide a fuller picture in the coming months.