When Mark Meadows resigned from Congress on March 30 to become White House chief of staff, he vacated a coveted seat. North Carolina’s recently redrawn 11th Congressional District encompasses most of the state’s mountainous western region and tilts Republican despite the liberal city of Asheville at its center.

Of the 12 candidates on the Republican primary ballot in March, the only two who earned more than 20% of the vote were 62-year-old businesswoman Lynda Bennett and Madison Cawthorn, who will not meet the constitutional age requirement for Congress until his 25th birthday on Aug. 1. Because neither broke the requisite 30%, the contest to replace Meadows has led to a June 23 runoff election that will pit two generations of the GOP against each other.