LANGHORNE, Pa. — In a hotel conference room a little over 20 miles northeast of the Philadelphia venue where the two major parties’ presidential nominees were set to debate hours later, a conservative group was preparing to rally its supporters Tuesday morning behind a Republican candidate locked in a tight battle for Pennsylvania votes.
No, the candidate was not former President Donald Trump. Americans for Prosperity Action, or AFP Action — a libertarian-leaning conservative group funded by the Koch network of conservative donors — and its Latino outreach arm, Libre Action, were instead holding a canvass kickoff event for Dave McCormick, a former hedge fund manager and Gulf War veteran engaged an uphill battle to unseat U.S. Sen. Bob Casey (D-Pa.).
“We’re fighting for our American dream — the American dream that is slipping away from us,” Jennie Dallas, the Harrisburg-based strategic director of the affiliated Libre Initiative, told the multiracial crowd of staff…