British Prime Minister Keir Starmer ’s vow to prove his doubters wrong following heavy losses for his party in local elections have done little to ease calls for him to step down.  “I’m not going to shy away from the fact that I’ve got some doubters, including in my own [Labour] Party,” Starmer said in a filmed speech Monday morning, as he took responsibility for last week's election results. “I've spent too much time talking about what I am doing for working people and not enough time talking about why or who I stand for,” he added, promising to deliver the “change that we promised for a stronger and fairer Britain that we must build.”  But several lawmakers are still adamant that someone else should be steering the ship as Labour recovers from its losses. Overall, more than 40 MPs [Members of Parliament] have urged Starmer to step down or establish a timetable for his departure.…