There is great outrage in Russia over US President Joe Biden's statements about Vladimir Putin remaining in power.

Biden makes statements and mistakes with “terrifying regularity” that are worse than crimes, said prominent Russian foreign politician Konstantin Kosachev.

He was responding to Biden's words that Putin could not remain in office because of the war in Ukraine.

There were times when a US president's word carried weight, but that's over now, said the chairman of the foreign affairs committee in the Russian Federation Council.

The Kremlin also made it clear on Sunday evening that it was not the Americans who decided on leadership in Russia.

“Biden does not decide that, the President of Russia is elected by the Russian people,” said Kremlin spokesman Dmitry Peskov after Biden’s speech in Poland.

Biden had said in front of a historic backdrop in the inner courtyard of Warsaw's Royal Castle: "For God's sake, this man cannot remain in power."

Previously, Biden had also referred to Putin as a "butcher," "war criminal," and "murderous dictator."

The Russian head of parliament Vyacheslav Volodin accused the US President of "undiplomatic statements" and "hysteria".

"Biden is weak, sick and unhappy," Volodin commented on Telegram.

“US citizens should be ashamed of their president.

Maybe he's sick.

It would be right if Biden were to be medically examined.” Putin, on the other hand, deserves respect for his “restraint”.

Russia had recently warned against breaking off diplomatic relations due to the massive tensions with the United States.