Israel’s Benjamin Netanyahu Urges Congress to Block ‘Bad Deal’ With Iran

WASHINGTON—Israeli Prime Minister Benjamin Netanyahu, in a dramatic and highly public showdown with a U.S. president, told a joint session of Congress Tuesday that an emerging diplomatic agreement with Iran would not only fail to stop Tehran from acquiring nuclear weapons, but virtually ensure it gets them.

“This is a bad deal. It’s a very bad deal. We’re better off without it,” Mr. Netanyahu said in a 40-minute address that drew...