Biden calls Putin “crazy son of a bitch” during campaign fundraiser. The Kremlin responds that the comment demeans the United States and presents the president as “a Hollywood cowboy” The insult was uttered at a fundraising event in San Francisco, during a three-day tour of California undertaken to finance his presidential re-election campaign.

Biden has a tendency to go off script during election fundraisers and in recent months has lashed out at the Chinese government, the Republican Party and U.S. ally Israel.