France is famously America’s oldest ally, but more than half of French people no longer consider the United States a reliable partner, according to a survey released Wednesday. Just 44 percent said the US was a “trusted ally” under President Donald Trump — a 33-point plunge since the same survey was done in May 2014, when Barack Obama was in the White House. Only 17 percent said they had a positive opinion of Trump in the IFOP poll, commissioned by the American Jewish Committee advocacy group, France’s Foundation for Political Innovation and the Sursaut think-tank collective. Some 54 percent said...