According to Dr. Fauci himself, he says President Donald Trump listens to his advice and stands with the science every single time. Fauci gives him advice on if something is a good or bad idea, and Fauci says he listens to it.
This is despite what Joe Biden is out there suggesting. Biden is saying that if he was president, he would be 100% behind the science. This is Biden's way of suggesting that Trump does not listen to science, without actually saying it.