Russia is running low on weapons and is turning to North Korea for help.
U.S. Vice President Kamala Harris warns both Putin and Kim Jong-un of the consequences of such a meeting.
Reports suggest that the North Korean leader is already on his way to Russia.
Amidst the ongoing conflict in Ukraine, it appears that Russian President Vladimir Putin is running out of weapons and ammunition.
According to U.S. sources, Russia is hoping to strike an arms deal with North Korea within a month, a move that is expected to have repercussions.
U.S. Vice President Kamala Harris warned in a CBS interview that a meeting between Putin and North Korea's Kim Jong-un would be a "big mistake," predicting that arms supplies from North Korea to Russia would lead to further isolation for both countries.
"We are clear about our goal of complete denuclearization of North Korea," said Harris. "But when we think about Russian aggression in Ukraine, it's an absolute violation of one of the most important agreements we have globally regarding international rules and norms, namely the importance of sovereignty and territorial integrity."
The Vice President called the planned meeting an "act of desperation" for Russia and a big mistake for North Korea.
Jake Sullivan, the U.S. National Security Advisor, also warned that North Korea would "pay a price" in the international community for arms deals with Russia.
Reports from South Korean news agency Yonhap suggest that Kim Jong-un is already on his way to Russia, although neither Russia nor North Korea have officially confirmed the meeting.