BERLIN (Reuters) - Germany's parliament is set on Friday to vote to allow marriages between people of the same sex, embarrassing Chancellor Angela Merkel's conservatives and handing her Social Democrat (SPD) challengers a rare victory months before a national election.
Success in passing the so-called "marriage for all" amendment will be a tonic for the centre-left party, which has barely made a dent in Merkel's comfortable poll lead after months of campaigning.
