svg]:overflow-visible">Listen to article • 0:00 minThe final stretch of primary season has scrambled the battle for Congress, as scandals, insurgent victories and voters’ rejection of party leaders’ preferred candidates reshape a small but critical set of races.Democrats’ path to a Senate majority narrowed with the triumph of progressive insurgent Abdul El-Sayed in Michigan, whom polls show faring worse against former Rep. Mike Rogers (R) than his primary rival. Republicans suffered their own setbacks as a Trump-endorsed congressional candidate in Michigan lost to a rival who had suspended his campaign, while misconduct allegations drove a vulnerable North Carolina incumbent from the race.Republicans...