President Donald Trump has congratulated Boris Johnson on his victory in the U.K. general election yesterday, saying his win presented the opportunity for a “massive” trade deal.

Trump tweeted that any post-Brexit trade deal between the countries would be “more lucrative than any deal that could be made” with the European Union.

He also described the U.K. prime minister’s win as “great” in his tweet, posted in the early hours of Friday.

After five weeks of campaigning, Johnson was declared winner of the U.K. election Thursday when the BBC’s exit poll results were broadcast at 10 p.m.

At the time of writing, Johnson’s Conservative party has won 364 seats in the House of Commons from a total of 650, with results in only one seat yet to be declared.

By comparison, the Labour Party had only won 203 seats while the Scottish National Party and Liberal Democrats picked up 48 and 11 seats respectively.

This gives Johnson a working majority of at least 39 MPs and greater power to push through legislation on Brexit, trade and other policies.

Responding to his win last night, Trump tweeted: “Congratulations to Boris Johnson on his great WIN! Britain and the United States will now be free to strike a massive new Trade Deal after BREXIT.

“This deal has the potential to be far bigger and more lucrative than any deal that could be made with the E.U. Celebrate Boris.”

Congratulations to Boris Johnson on his great WIN! Britain and the United States will now be free to strike a massive new Trade Deal after BREXIT. This deal has the potential to be far bigger and more lucrative than any deal that could be made with the E.U. Celebrate Boris!

— Donald J. Trump (@realDonaldTrump) December 13, 2019

President Trump has previously given his backing to Johnson, telling reporters in November this year that he was the “right man for the time” and a “great gentleman.” He also tweeted in August that the Tory party boss was “exactly what the U.K. has been looking for.”

Newsweek has contacted the Conservative Party for comment on Trump’s latest tweet about Johnson and the prospects of a U.S.-U.K. trade deal, but did not receive an immediate response.

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The prospect of a U.S.-U.K. trade deal was a focal point of the five-week election campaign, which began shortly after MPs voted on 29 October to trigger an early general election.

Labour Party leader Jeremy Corbyn held a press conference where he revealed unredacted official documents with details of trade talks between U.S. and British officials, warning that the U.K.’s public National Health Service (NHS) would be “on the table.”

The Guardianreported that the documents confirmed the NHS, drug pricing and the pharmaceutical sector had been raised in discussions, but no specific decisions were made on what would be opened up to the market in any trade deal.

Prime Minister Johnson repeatedly denied that the NHS was “on the table” in any trade discussions with the United States.

President Trump’s talk of a “massive” prospective trade deal with the U.K. came just days after Democrats announced their support for his United States-Mexico-Canada Agreement (USMCA) revision of the NAFTA trade deal.

“Looking like very good Democrat support for USMCA,” Trump said after the announcement. “That would be great for our Country!”