Want to see the power of a Presidential tweet? Ask Pfizer, whose stock plummeted in the wake of President Trump's tweet attacking its drug pricing structure.

Want to see the power of a Presidential tweet? Ask Pfizer, whose stock plummeted in the wake of President Trump's tweet attacking its drug pricing structure. pic.twitter.com/NLq5BH39hX

— Phil Elliott (@Philip_Elliott) July 9, 2018