HARRISBURG, Pa. (AP) — A former state lawmaker who heads Pennsylvania's third most populous county says he's running for state attorney general. Josh Shapiro told The Associated Press on Monday that he'll make a formal campaign announcement Tuesday. The 42-year-old Democrat is chairman of Montgomery County's commissioners. He also is Gov. Tom Wolf's appointee atop the Pennsylvania Commission on Crime and Delinquency. He's joining a crowded field of would-be candidates vying to succeed the embattled Attorney General Kathleen Kane in the November election.