Trump Threatens Trade Actions After EU Fines Google Over Ad Tech

US President Donald Trump threatened a probe that could prompt fresh tariffs in response to the European Union fining Alphabet Inc.’s Google over findings the company abused its dominance by giving its own ad exchanges a competitive advantage.

The president made his warning in a social media post Friday after the EU announced it was fining Google almost €3 billion and ordering the search giant to stop favoring its own advertising technology services.