Discrepancies between the two sides' version of the deal have emerged, and key details of the agreement are yet to be negotiated.

"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.

Donald Trump has agreed a trade deal with the EU Commission president after he played a round of golf on the second full day of his visit to Scotland. The US president shook hands on the deal with Ursula von der Leyen at his luxury Turnberry resort, saying: "It's going to bring us closer together... it's a partnership in a sense."