President Vladimir Putin met with North Korean leader Kim Jong Un on Wednesday following a huge military parade in Beijing, where the Russian leader thanked Kim for his country's help in driving out Ukrainian forces from the Kursk region.

Please give my warmest regards to Vladimir Putin, and Kim Jong Un, as you conspire against The United States of America,” Trump wrote in a social media post directed at Xi.

In a rare international visit, the North Korean leader will be at the Sept. 3 parade alongside Russian President Vladimir Putin.