NEW: WH trade adviser Peter Navarro responds to letter signed by Big Pharma groups opposing Trump's 'Buy American' EO:

'Big Pharma and its well-heeled Swamp Creatures need to stop being such a divisive element in American politics.'

Full statement here:https://t.co/FlaYCSYyc5

— Amber Duke (@ambermarieduke) March 26, 2020