PHILADELPHIA — Former President Donald Trump endorsed State Sen. Doug Mastriano in Pennsylvania’s Republican primary for governor, announcing his support for the front-runner just days before Tuesday’s election. The endorsement could very well put him over the top and deal a crippling blow to 11th-hour efforts by some establishment Republicans to stop Mastriano, a far-right, staunch Trump ally who they fear will lose the general election in November. “There is no one in Pennsylvania who has done more, or fought harder, for Election Integrity than State Senator Doug Mastriano,” Trump said in a …
