German Chancellor Angela Merkel vowed Monday to try to keep Europe united as leaders argue over one of the European Union's top jobs, stressing that she wants an increasingly skeptical Britain to stay in the EU. Choosing a successor to Jose Manuel Barroso as president of the EU's executive Commission has become a political headache for Merkel and British Prime Minister David Cameron. According to AP, the conservative European People's Party, which includes Merkel's bloc, finished first in May's European Parliament elections after campaigning for former Luxembourg premier Jean-Claude Juncker to get the job. Britain opposes Juncker, while Merkel has drawn criticism at home for appearing cool toward him after the election. In Germany, the vote was often billed as giving voters a say on the next Commission president.