The US has struck a deal for a stake in Venezuela's oil fields, a long-term win for American energy leverage and bad news for Iran and China.

• The US gets equity in Venezuelan fields holding tens of billions of barrels of reserves, with the Pentagon overseeing the arrangement and Marco Rubio running the talks.
• Chevron is putting $7 billion into doubling its Venezuelan output, targeting oil that costs about $20 a barrel to pull out of the ground versus a world price above $90.
• The bigger play is Iran: heavy sanctions and open threats against Iranian oil facilities squeeze Tehran, and Venezuelan barrels give China somewhere else to buy if Iranian supply gets cut off.
• Venezuela gets roughly $100 billion in promised private investment and new tax money to rebuild power, water, and basic infrastructure.
• The move fits a longer sequence — locking down the Western Hemisphere and US supply first, then turning up the heat on Iran.

Outlook: The oil itself is years away, but the pressure on Iran and the squeeze on China's supply lines is happening now.