The move, affecting about one-fifth of the National Science Foundation’s primary research budget, is the latest sign of how the White House is asserting more control over grants.

© Alex Kent/The New York Times

Over 90 percent of Ukraine’s scientific discoveries have been attributed to Ukraine’s National Academy of Sciences, including advancements in astronomy and military technology.

© Finbarr O'Reilly for The New York Times

A Russian jet-powered drone hit Ukraine’s National Academy of Sciences, the source of almost all of the country’s major scientific discoveries.

© Gleb Garanich/Reuters