U.S. production of crude oil will fall 13% by year’s end, according to a government forecast Tuesday—numbers the White House hopes to use to convince Saudi Arabia and Russia to end their price war, a senior administration official said. Saudi Arabia, in a dispute with Russia, has worsened a global oil glut by ramping up production at a time when demand has dropped because of the coronavirus pandemic. Both countries have said privately they are open to reducing production only if the U.S. also agrees to mandate cutbacks. …