U.S. officials warn China against supplying arms to Russia amid war in Ukraine.
Officials are concerned with China's relations with Russia as they suspect China is "nearing a red line" in assisting Russia during war against Ukraine.
On Saturday, Vice President Kamala Harris determined that Russian forces have committed crimes against humanity during the war in Ukraine.
Mr. Blinken told CBS that is China were to supply Russia with lethal support, it would cause a "serious problem" in the U.S.-China "relationship".
However, Beijing has denied lethal support for Ukraine and claims that they perform normal trade with Russia.
by Ryan Griffin