Democrats took control of the U.S. House of Representatives in 2018 thanks to a record showing by Democratic female candidates. Two years later, a record number of GOP women won seats, bringing the number of women in the chamber to a historic high. But for some female incumbents running for reelection this year, including in Illinois, holding their seats comes with a new challenge: redrawn congressional districts that will be tougher to win. It’s too early to know how many female representatives were hurt by the once-a …