President Donald Trump’s nominee to lead the Food and Drug Administration was grilled Thursday over whether he would reverse course on several actions the administration has taken in recent weeks that have alarmed Democrats and public health experts — and even garnered concern from some Republicans.

Martin Makary, President Donald Trump's nominee to run the U.S. FDA, told lawmakers on Thursday he would convene a committee of vaccine advisers but said he would reevaluate which scientific issues require their input.