WSJ:

Republicans are favored to take control of the House in this year’s midterm elections, and redistricting has given them a built-in advantage that could span the next 10 years.

The GOP is expected to net a handful of seats based solely on new district lines drawn to reflect population changes captured by the 2020 census. Perhaps more important, the party will start with a larger base of safe seats than Democrats. Such an advantage, which could stretch over the next five election cycles if the new maps survive court challenges and the country’s political polarization remains largely unchanged, will allow the Republican Party to direct more resources at fewer seats in seeking a majority. It will also make the party less vulnerable to suffering a large loss of seats in a single election.