Democrat Lindsay Powell is expected to win a special election for Pennsylvania’s 21st state House District. Powell, the director of workforce strategies at the nonprofit InnovatePGH, defeated Republican Erin Connolly Autenreith, a real estate agent and the chair of the Shaler Township Republican Committee, to win the Allegheny County seat, The Hill reported. Powell’s victory boosted Democrats ahead of Tuesday’s state House special election, whic…