President Donald Trump shakes hands with European Commission President Ursula von der Leyen, as US Commerce Secretary Howard Lutnick, US Trade Representative Jamieson Greer and White House Deputy Chief of Staff Stephen Miller clap after an announcement of a trade deal between the US and EU in Turnberry, Scotland, on July 27.

"I think it's the biggest deal ever made," Trump said of the new agreement, which will reduce the bloc's tariff rate to 15 percent.

The Europe trade deal will see the U.S. impose a 15% import tariff on most EU goods − half the threatened rate but much more than Europeans hoped for.