Trump Threatens Russia With Oil Tariffs

US President Donald Trump threatened Russia with new tariffs on oil products if Moscow blocks his cease-fire initiatives, while he also said Ukrainian leader Volodymyr Zelenskyy faces "big, big problems" if he doesn't sign a key minerals deal with Washington. "He's trying to back out of the rare earth deal, and if he does that he's got some problems, big, big problems," Trump told reporters on March 30 in reference to the Ukrainian president. "We made a deal on rare earth. And now he's saying, well you know, I want to renegotiate the deal." "He…