United States President Donald Trump has threatened to impose steep trading restrictions on Russia unless a peace deal with Ukraine is reached within 50 days, as he announced an agreement with NATO allies to send more weapons to Kyiv.

Trump ripped into the Russian leader, accusing him of being “all talk” after months of U.S. efforts to broker a deal to end the war he started by ordering an invasion of Ukraine, and said he’d prefer not to use the powerful secondary sanctions he’s threatened but stressed that the war “has got to stop.”