GOP jaws are dropping at the policy platform former President Donald Trump and his MAGA allies are presenting at the Republican National Convention, according to a new report. Multiple Republicans told Politico this week they were shocked by the sudden shift toward economic populism and isolationism and away from religious and fiscal conservatism seen at the Milwaukee gathering. “What we’re witnessing now is a full on frontal assault on conservatism,” said Marc Short, onetime chief of staff to Vice President Mike Pence. “That’s an enormous departure from where our party has been and I don’t th…