Keir Starmer’s office has begun polling British Muslim voters amid growing concern in senior Labour ranks about the damage done to their core vote by the row over the party’s position on the Middle East. Labour sources have told the Guardian that the party is running polls and holding focus groups around the country after senior officials became concerned they were losing support among one of their staunchest bases of support. The outreach effort is just one aspect of how the Middle East crisis has transformed the party in the last few months. MPs who care about the issue have...