LONDON—Prime Minister Theresa May cannot accept a proposal to hand parliament more control over Brexit, her spokesman said on June 19, setting up a showdown with lawmakers who want the right to step in if Britain risks crashing out of the EU with no deal.
May has struggled to get backing for an EU withdrawal bill that would cut ties with the bloc. She tried to find a compromise last week with pro-EU lawmakers in her Conservative Party, but the arrangement fell through.
