Democrat Conor Lamb and Republican Rick Saccone each could see a primary contest in new congressional districts after they battled for an existing district in southwestern Pennsylvania.
Lamb's campaign said Friday that he's seeking a full term in Congress in a new district west of Pittsburgh against three-term Republican Rep. Keith Rothfus.
Democrats Elizabeth Tarasi and Ray Linsenmayer say they're gathering signatures to get on May's primary ballot, too.
Lamb holds a slim lead over Saccone after Tuesday's special election to fill the remaining 10 months of disgraced ex-Republican Rep. Tim Murphy's term. Vote-counting is ongoing.
Saccone and Republican...