Because of the explosive growth of metro areas in states such as Texas and Georgia, suburban congressional districts that Republicans can win in the near term might not remain winnable for long. “One of the things that map drawers in places like Texas or Georgia have to be wary of is spreading themselves too thin in an effort to grab a maximal number of seats in 2022,” said Kyle Kondik, managing editor of Sabato’s Crystal Ball at the University of Virginia Center for Politics. “Maybe you win some extra seats in 2022, but you can’t hold them in the future, and the maps unravel.”