PDP President Pablo José Hernández By THE STAR STAFF Popular Democratic Party President Pablo José Hernández marked the 74th anniversary of Puerto Rico’s Constitution this weekend with a pointed warning about what he considers the island’s most corrosive political threat: the erosion of public trust driven by corruption and the outsized influence of money in government. Speaking before an audience in Cayey, he set aside the customary debate over the commonwealth’s legacy to focus instead on…