WASHINGTON, D.C.—Today, U.S. Senator Peter Welch (D-Vt.) joined U.S. Senator Ed Markey (D-Mass.), U.S. Senator Maria Cantwell (D-Wash.), Democratic Leader Chuck Schumer (D-N.Y.), and 22 colleagues in demanding answers from President Trump and Acting Head of the National Science Foundation (NSF) Brian Stone on why the president dismissed all members of the NSF’s National Science Board (NSB), the advisory…