PM May pledges to quit before next UK election as she fights leadership challenge

British Prime Minister Theresa May promised on Wednesday to step down before the next parliamentary election due in 2022, hoping to win over wavering lawmakers before a no confidence vote triggered by Brexiteers in her Conservative Party.Less than four months before Britain is due to leave the European Union on March 29, the country's exit is in chaos with options ranging from a potentially disorderly "no-deal" departure to another referendum that could reverse it.The Conservative lawmakers are