Former deputy assistant U.S. Secretary of State Joel Rubin joined Cheddar to break down the latest dispute between G7 nations and Russia as its increased military buildup along the Ukrainian border drew stern warnings of "massive consequences" should an invasion occur. "If Putin wants to keep on going further, there will be many tools that the financial system can use against him, and the United States, now, is gathering our allies in a way that is really unprecedented," he said.