EUROPE - In March, Trump slapped tariffs of 25 percent on steel imports and 10 percent on imported aluminum, but granted the 28 EU countries a temporary exemption until June 1. He also temporarily exempted big steel producers Canada and Mexico, provided they agree to renegotiate a North American trade deal to his satisfaction. "It's Europe's economic sovereignty, and what we are demanding is that we are exempted without conditions or time limits," French President Emmanuel Macron said in Bulgaria, where EU leaders have gathered for a summit with Balkans countries. Convinced that the US move breaks global trade rules, the EU has drawn up a list of "rebalancing" duties worth some 2.8 billion euros ($3.4 billion) to impose on US products if it is not permanently exempt. It has vowed not to negotiate under threat.