A group of 30 House Democrats has sent a letter to Secretary of State Marco Rubio pressing the State Department to end its decades-long policy of “official ambiguity” on Israel’s nuclear weapons capabilities. The letter, dated May 4 and led by Rep. Joaquin Castro (D-Texas), ranking member of the House Foreign Affairs subcommittee on the Western Hemisphere, was sent as the United States continues military operations against the Iranian regime alongside Israel. “We are, in the fullest sense, fighting this war side by side with a country whose potential nuclear weapons program the United States government officially refuses to acknowledge,” the lawmakers wrote....