L ONDON -- Ukrainian President Volodymyr Zelenskyy's top adviser urged the U.S. to "strangle" Russia's economy by imposing secondary sanctions on Moscow's trading partners, as the White House push for a ceasefire appears to languish.

Viktor Vodolatsky hit back at Trump's recent announcement about moving two U.S. nuclear submarines, saying his country has better ones.

U.S. President Donald Trump has given Russian President Vladimir Putin a new deadline to end the war in Ukraine.