Merkel's SPD rivals rally in search of German election rebound

German Chancellor candidate Martin Schulz of the Social Democratic party (SPD) shakes hands with former German Chancellor Gerhard Schroeder, next to former SPD leader Franz Muentefering, as he arrives at the party convention in Dortmund, Germany, June 25, 2017. REUTERS/Wolfgang Rattay

DORTMUND/BERLIN, Germany (Reuters) - Germany's Social Democrats (SPD) rallied behind their leader on Sunday, agreeing policies on investment, social justice and Europe that they hope will reverse a slump in opinion polls and end Angela Merkel's 12-year hold on power in a September vote.

At a 'feel-good' party conference, leader Martin Schulz accused Merkel of silencing debate on issues like pensions and failing to stand up to the United States.