British Prime Minister Boris Johnson warned on a trip to Kyiv Tuesday that Russian forces massed on the border represented a “clear and present danger” to Ukraine. “We see large numbers of troops massing, we see preparations for all kinds of operations that are consistent with an imminent military campaign,” Johnson said at a press conference with Ukraine’s President Volodymyr Zelensky. The British prime minister said that UK sanctions will be automatically imposed on Russian commercial interests and individuals the moment any incursion into Ukraine takes place. “It’s vital that in Moscow, the…