Trump administration added exemptions to a big group of trading partners, at least for now.

It will include European Union, along with Argentina, Australia, Brazil and South Korea.

Canada and Mexico were earlier left off the list of countries subject to the tariffs.

The new tariffs is expected to be effected tomorrow (3/23/2018) as proposed.

Please see the below link for a detailed news.

https://www.nytimes.com/2018/03/22/business/us-eu-tariffs-steel-aluminum.html