NEW YORK (AP) — An executive order signed by President Donald Trump late Thursday aims to give political appointees power over the billions of dollars in grants awarded by federal agencies. Scientists say it threatens to undermine the process that has helped make the U.S. the world leader in research and development.

The order requires all federal agencies, including FEMA, the National Science Foundation and the National Institutes of Health, to appoint officials responsible for reviewing federal funding opportunities and grants, so that they “are consistent with agency priorities and the national interest.”

It also requires agencies to make it so that current and future federal grants can be terminated at any time — including during the grant period itself.

Agencies cannot announce new funding opportunities until the new protocols are in place, according to the order.

The Trump administration said these changes are part of an effort to “strengthen oversight” and “streamline agency grantmaking.” Scientists say the order will cripple America’s scientific engine by placing control over federal research funds in the hands of people who are influenced by politics and lack relevant expertise.