Why is the US so angry with Saudi Arabia about oil supply cuts?

Joe Biden has threatened consequences' after Opec+ decided to reduce supply in a decision that will benefit Russia

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When Joe Biden gave Saudi Arabia's de facto ruler, Mohammed bin Salman, a fist bump in Jeddah in July, it was viewed as a moment of excruciating realpolitik: Biden, who had vowed to make Saudi Arabia a pariah state over the assassination of dissident journalist Jamal Khashoggi, was instead palling around with the man believed to have ordered the hit. Today, that gambit appears to have failed - and the relationship is in tatters.

Biden visited Saudi Arabia in the hope of persuading the world's largest oil producer to increase production and offset petrol costs rising as a result of Russia's invasion of Ukraine. Instead, last week, Saudi Arabia and its allied oil producing nations in the Opec+ group - including Russia - agreed to a surprise reduction in supply that will push prices up. The undoubted beneficiary is Vladimir Putin.