"A female passenger in an evening gown ran from the car, climbed the stone parapet along the Tidal Basin and... leaped headfirst into the frigid, inky water. Her splashdown would ripple into one of the capital’s most infamous sex scandals."

From "Fanne Foxe, ‘Argentine Firecracker’ at center of D.C. sex scandal, dies at 84" (WaPo). 

Standing near the car — drunk and bleeding — was her paramour, 65-year-old Wilbur Mills, the gravelly voiced chairman of the tax-writing U.S. House Ways and Means Committee and a man esteemed as a pillar of Bible Belt rectitude and respectability. The Arkansas Democrat, an ascetic grind who shepherded Medicare and other influential legislation through Congress, was also widely regarded as the most powerful man in government after the president. “I never vote against God, motherhood or Wilbur Mills,” a Democratic colleague once told a reporter.

But on that October morning, Ms. Battistella’s eyes were bruised. Mills’s Coke-bottle glasses were smashed, and his nose was badly scratched. He reeked of alcohol. And his 16-year hold on the federal purse strings was suddenly imperiled....

ADDED: "Ms. Battistella" = Annabel Battistella AKA Fanne Foxe.