Earlier this week, 30 House Democrats sent a letter to U.S. Secretary of State Marco Rubio urging the United States to publicly acknowledge Israel’s nuclear weapons program. Led by Rep. Joaquin Castro, they called Washington’s long-standing policy of silence indefensible amid the war with Iran and asked whether Israel had conveyed any “red lines” for nuclear use. Castro posed a question whose force lay in its simplicity: The United States openly discusses the nuclear programs of Britain, France,