National security adviser John Bolton says the U.K. is first in line for a trade deal with the U.S.
Bolton's comments come after his meeting with newly elected British Prime Minister Boris Johnson in London on Monday.
Bolton told reporters that the Trump administration "enthusiastically" supports the prime minister's decision to leave the European Union with or without a Brexit deal in place and could reach sector-by-sector trade deals with the U.K. "very quickly."
Johnson said a trade deal with the U.S. would open opportunities for U.K. businesses but would be a "tough old haggle."
The U.K. is set to leave the EU by Oct. 31, and so far, Johnson has been unsuccessful at renegotiating an exit deal.