Trump vows to investigate EU over fining of US tech companies BBCTrump threatens EU with ‘substantial’ tariffs over fines of US tech giants The GuardianGoogle hit with $1 billion European Commission fine RTE.ieTrump threatens EU with ‘substantial TARIFF’ for ‘ROBBING’ U.S. tech giants CNBCDonald Trump threatens fresh tariffs on EU in retaliation for €890m Google fine The Irish Times