The U.S. ambassador to NATO has said Russian President Vladimir Putin has a “sick and twisted and probably not logical” mind. American diplomat Matthew Whitaker was speaking as President Donald Trump’s deadline for Moscow to make progress toward ending the war in Ukraine is set to expire on Friday. “It is impossible to get into the mind of Vladimir Putin because it is sick and twisted, and probably not logical. But I’m guessing he doesn’t want to take on the most powerful military in the world, which is the United States of America,” Whitaker told right-wing U.S. television channel Newsmax...