President Joe Biden’s top national security adviser said Sunday that the White House had not yet seen China provide Russia with lethal assistance in its war on Ukraine and warned Beijing that doing so would be against its interests. 4, China declined Washington’s request for a secure call between Defense Secretary Lloyd Austin and his counterpart, National Defense Minister Wei Fenghe, the Pentagon said. Sullivan also addressed why the White House has declined calls from lawmakers from both major parties to provide Ukraine with F-16 fighter jets, saying such a possibility was for “another phase” of the war