LONDON • Boris Johnson took over as Britain’s prime minister Wednesday, vowing to break the impasse that defeated his predecessor by leading the country out of the European Union and silencing “the doubters, the doomsters, the gloomsters” who believe it can’t be done.

But the brash Brexit champion faces the same problems that flummoxed Theresa May during her three years in office: heading a government without a parliamentary majority and with most lawmakers opposed to leaving the EU without a divorce deal.

Johnson has just 99 days to make good on his promise to deliver Brexit by Oct. 31 after what he called “three years of unfounded self-doubt.”

He optimistically pledged to get “a new deal, a better deal” with the EU than the one secured by May, which was repeatedly rejected by Britain’s Parliament.

“The people who bet against Britain are going to lose their shirts,” he said, standing outside the shiny black door of 10 Downing St.

Trying to avoid the political divisions that plagued May, Johnson swept out many of her ministers to make way for his own team, dominated by loyal Brexiteers. He appointed Sajid Javid to the key role of Treasury chief, and made Priti Patel the new home secretary.

Britain’s new Prime Minister Boris Johnson waves Wednesday from the steps outside 10 Downing Street in London.

the associated press