The President of the USA has also withdrawn the US from a number of key global bodies, some in place over 80yrs and aimed at addressing peace, environmental, human rights, culture & heritage and health issues, globally. Notably; UNESCO The UN Human Rights Watchdog The WHO The Global Climate Accord.
So evidently; the president of the USA places zero importance on promoting peace, improving global health, promoting human rights, addressing environmental issues or protecting our global heritage. So no interest in protecting key US heritage sites like Yosemite; can't profit from public parks, eh.