UK’s Johnson weakened by key party defections over Brexit

By DANICA KIRKA and GREGORY KATZ
LONDON — British Prime Minister Boris Johnson suffered key defections from his party Tuesday, losing a working majority in Parliament and weakening his position as he tried to prevent lawmakers from blocking his Brexit plans.
On a day of high drama and acerbic debate in the House of Commons, lawmakers returned from their summer recess to confront Johnson over his insistence that the U.K. leave the European Union on Oct. 31, even without a withdrawal agreeme