BRUSSELS (AP) — European Union leaders on Tuesday sought a way to bounce back from the weekend's landmark elections that saw a partly hostile and largely apathetic public question their project of closer cooperation as never before. The first battle will likely be over Jean-Claude Juncker, the former prime minister of Luxembourg and longtime leader of the group of nations with the euro currency, who wants to replace Jose Manuel Barroso as leader of the EU Commission. Leaders of the six party groups in the European Parliament met behind closed doors early Tuesday to discuss the election outcome and potential leadership changes which could have a direct impact on the summit.