Ready for War Europe has not won a kinetic war without U.S. help, but one German official quoted by the Wall Street Journal boasted, “If they [U.S.] want war, they will get war.” Admittedly, Europe has been far better at defensive trade policy than it has been at fighting Russian aggression. Brussels proclaims to have an open market with lower tariffs but then concocts complex legalese nontariff barriers. Meanwhile, Mr. Trump is using obstinance and moving goalposts as per his usual negotiating tactics. Brussels is dusting off its anti-coercion measures, which would shift the trade war’s ordinance beyond conventional tariff measures, but the White House says it will match and up its ante.   The question is whethe...