Europe must take “concrete actions” to rein in its enforcement of laws that disproportionately hit American tech companies, U.S. Trade Representative Jamieson Greer said at Axios House D.C. on Tuesday.

Why it matters: At stake is who gets to write the rules for the world’s dominant tech companies — Washington or Brussels — and Greer wants America to lead the way on how its companies operate.

What they’re saying: “People differ on how big tech should be treated,” Greer told Axios’ Mike Allen on Tuesday.

• “What I can tell you is we’re not going to let Europe control the global regulation of our companies, which generally give a lot of free services to consumers and provide a lot of consumer welfare.”
• “So, whatever challenges we may have with these companies, and they are real, and we want to cover them, we’re just not going to let Europe be the arbiter.”

Go deeper: WATCH: Axios House DC