An unofficial oil-for-security pact between the U.S. and Saudi Arabia has survived 15 presidents and seven kings, but is now fracturing under two leaders who don’t like each other. WSJ’s Stephen Kalin explains why the U.S. and Saudi Arabia’s relationship has hit a new low.Further Reading: - U.S.-Saudi Relations Buckle, Driven by Animosity Between Biden and Mohammed bin Salman  - Saudi Conference Draws Wall Street Executives Amid Strained Ties With U.S.  Further Listening: - As Saudi Arabia Cools on the U.S., It Warms to China  Learn more about your ad choices. Visit megaphone.fm/adchoices