Hong Kong media magnate and democracy champion Jimmy Lai thinks that President Donald Trump is wise to “play hardball” with China’s ruling communists on trade because “that’s the only thing they understand.” But Mr. Lai is also urging the U.S. to “show humility” and allow China an opportunity to save face in striking a new deal.

Mr. Trump “knows what he’s doing,” says Mr. Lai, adding: “He’s a bit crazy, but it’s genius crazy.” Mr. Lai is in the U.S. seeking help to preserve and advance liberty in Hong Kong as the Chinese regime...