The European Union estimates that the first wave of Donald Trump’s steel and aluminum tariffs will hit as much as €28 billion ($29.3 billion) of the bloc’s exports in what would be a massive escalation in the US president’s trade war.

The European Commission is investigating whether to tighten its current system of quotas on steel imports to protect EU producers from new tariffs U.S. President Donald Trump plans to impose on incoming steel and aluminium on March 12.

President Donald Trump suggested imposing tariffs on auto imports, threatening to drive up the cost of cars further amid plans for tariffs on steel, aluminum, Canada, and Mexico. But economists and the insurance industry say that this will raise auto insurance costs.