By Kanishka Singh (Reuters) -U.S. national security adviser Jake Sullivan spoke on Wednesday with Nikolay Patrushev, the secretary of Russia’s Security Council, in the first high-level contact publicly disclosed between the two countries since the invasion of Ukraine, and warned Patrushev about the consequences “of any possible Russian decision to use chemical or biological weapons in Ukraine.” The White House statement after the call between the two officials did not specify what those consequences would be. Washington and its allies have accused Russia of spreading an unproven claim that Ukr…