Iran's 2015 nuclear agreement under threat

With regard to the Iran nuclear deal, signed by six global powers and Theran in 2015, US Administration has recently demanded  more sanctions and changes. During a meeting held in Brussels one week ago, the EU Countries reaffirmed their support for the Iranian deal that President Trump has rejected. 

So European States have shown they want to preserve Iran's 2015 nuclear agreement with world powers, which is seen under  threat from the United States. 

But, according to Iran, this is not enough: if US permanent restrictions on Iran were implemented, Theran would be ready to see how the EU would protect their companies dealing in transactions with Iran. It they take actions, Iran will go long with Europeans.