Vice President JD Vance threatened to abandon Russia and Ukraine peace negotiations on Wednesday ahead of a high-stakes meeting in London where the two warring nations are to discuss President Trump’s “final offer.” “We’ve issued a very explicit proposal to both the Russians and Ukrainians, and it’s time for them to either say yes or for the US to walk away from this process,” Vance told reporters during his trip to India. We’ve engaged in an extraordinary amount of diplomacy.”