Dmitry Medvedev, an ally of Russian President Vladimir Putin, on Friday described the United States President, Joe Biden, as a “mad” disgrace to the US.

Medvedev said Biden had no right to compare himself to Franklin D. Roosevelt.

Biden opened his State of the Union address on Thursday with a reference to a 1941 speech to Congress in which Roosevelt said the union faced an unprecedented turning point in history.

Biden also accused Republican rival, Donald Trump of kowtowing to Russia, two weeks after calling Putin a “crazy SOB”.

However, Putin’s ally wrote on X: “Even though Roosevelt was an infirm man in a wheelchair, he raised America from the Depression; Biden, on the other hand, is a mad, mentally disabled individual who set his mind on dragging humanity to hell.

“Roosevelt together with allies including the U.S.S.R., was fighting for peace; yet, Biden is actively and persistently trying to start WWIII.

“Roosevelt was fighting against fascists, but Biden is fighting for them,” Medvedev wrote in English. “He is the United States’ disgrace.”

Medvedev, who cast himself as a liberal moderniser when he was President from 2008-2012, now presents himself as an anti-Western Kremlin hawk.