The European Union and the US have announced a political agreement that will completely reset the €1.7 trillion ($2 trillion) transatlantic trade relationship.

"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.

President Donald Trump unveiled a trade agreement with the European Union on Sunday, making it the latest in a series of accords as the White House threatens to slap tariffs on dozens of countries this week.