Blinken announces US has delivered written responses to Russia over Ukraine crisis CNNRussia threatens 'appropriate measures' if West's responses to demands aren't constructive Fox NewsBlinken says U.S. responds to Russia's demands, seeks dialogue ReutersBlinken says U.S. has delivered response to Moscow's demands regarding Ukraine CBS NewsUS hands Russia written response to demands, says up to Kremlin how to proceed Fox NewsView Full Coverage on Google News