President Donald Trump’s tariffs on aluminum and steel imports are mostly driven by concerns that China is glutting global markets and hurting U.S. manufacturing, a former trade adviser to the White House said.

The amount of goods would be about four times larger than the last time Trump targeted the bloc’s metals sector.

The European Union estimated that the first wave of tariffs on steel and aluminium imposed by US President Donald Trump will result in a hit to EU exports worth up to €28 billion (approx. US$29.3 billion).