Washington, July 15 -- US President Donald Trump has threatened to impose 100 per cent "secondary tariffs" on Russia if a deal on Ukraine is not reached within 50 days.

During his meeting with NATO Secretary General Mark Rutte in the White House on Monday (local time), Trump expressed disappointment with his Russian counterpart, Vladimir Putin and threatened to impose severe tariffs if there is no deal within 50 days.

He said, "We are very unhappy, I am with Russia. But, we will discuss that maybe a different day. But, we're very, very unhappy with them, and we're going to be doing very severe tariffs if we don't have a deal in 50 days. Tariffs at about 100 per cent. You'd call them secondary tariffs. You know what that means. But today...