He only did so after it was clear that Mastriano was going to win the primary by a large margin. Trump didn't help Mastriano at all.
Not according to Mastriano. Mastriano was thrilled to have 45’s endorcement.
Trump held off endorsing because of Lou Barletta.
Anyone gassing out their sewer pipe about Trump waiting too long on Mastriano, is full of feces.