BARCELONA — Washington will retaliate if Europe imposes measures that favor its own satellite companies over American ones, the head of the United States' communications regulator Brendan Carr told POLITICO. He was responding to the EU's push to promote homegrown firms over foreign competitors in a series of laws covering defense procurement, space technology, digital supply chains and green tech. Carr joins a growing chorus of U.S. officials railing against the plans in recent weeks, including