LONDON (AP) — Britain's governing Conservative Party is set to reveal who the name of the country's next prime minister, with Brexit champion Boris Johnson the strong favorite to get the job.

Party officials will announce Tuesday whether Johnson or rival Jeremy Hunt has won a ballot of about 160,000 Conservative members.

The winner replaces Theresa May, who announced her resignation last month, and will officially become prime minister on Wednesday.

It will be a huge upset if the winner is not Johnson, who has wooed Conservatives by promising to succeed where May failed and lead the U.K. out of the European Union on the scheduled date of Oct. 31 — with or without a divorce deal.

Several Conservative ministers have already announced they will resign to fight any push for a "no-deal" Brexit.