Shannon Edwards — the forensic psychologist whose reported extramarital affair with former U.S. Rep. Tim Murphy contributed to his resignation — announced Wednesday that she is making a bid for Congress. Edwards, a Republican in her early 30s from Pittsburgh's Lawrenceville neighborhood, said that if elected, she pledges to be "an active, diligent" voice in Washington who will "fight the tough battles no one else chooses." Among her platform priorities: improving access to mental health treatment, reforming the criminal justice system and strengthening high school and post-secondary educational institutions. Under a court-imposed map being challenged by Republicans, Edwards could run...