In this July 24, 2018 file photo, House Speaker Paul Ryan of Wis., attends a news conference following a GOP caucus meeting on Capitol Hill in Washington. As Ryan bows out of Congress, he leaves no obvious heir apparent. House Republicans are scrambling to salvage their majority but also confronting a potentially messy GOP leadership battle regardless of which party controls the chamber after the November election. (AP Photo/Jacquelyn Martin)
WASHINGTON — Win or lose in the race for the majority, House Republicans are at risk of plunging into a messy leadership battle after the November election, with the party lacking a clear heir apparent to take the place of House Speaker Paul Ryan.