White House trade adviser Peter Navarro said he had never heard of President Trump asking the Chinese president to work to help him re-elect.

In an interview with CNN's State of Union program, Navarro said the allegations that former US national security adviser John Bolton directed against President Donald Trump were "stupid" because the White House boss was very hard.

"I have never heard of anything like that. I was in the room at the time," he said, referring to a meeting between President Trump and Chinese President Xi Jinping in June last year.

According to an excerpt from Bolton's memoirs entitled "The Room Where It Happened: A White House Memoir" (The Room where it happened: The White House Memoir), scheduled for June 23, the former security advisor

At a meeting with the Chinese President a year ago, President Trump "moved the dialogue into the US presidential election in a brilliant way, referring to China's economic ability to influence operations."

The Trump administration on June 16 filed a lawsuit against Bolton, after the White House National Security Council (NSC) determined the current draft of the memoirs contained sections containing confidential national security information, "