HARRISBURG, Pa. (AP) – Val Arkoosh, a trained anesthesiologist who chairs the board of Pennsylvania’s third-most-populous county, is ending her campaign for U.S. Senate and leaving a tough Democratic Party primary field. In a video message Friday, Arkoosh stressed the importance of a Democrat winning the Senate seat being vacated by retiring two-term Republican Sen. Pat Toomey and said she’d work to help that happen. The 61-year-old Arkoosh is a former chair of anesthesiology at Drexel University College of Medicine who now chairs the board of commissioners in Montgomery County. Also in the Democratic primary race are Lt. Gov. John Fetterman, state Rep. Malcolm Kenyatta of Philadelphia and U.S. Rep. Conor Lamb of suburban Pittsburgh.