Germans are going to the polls on Sunday for national elections. Opinion polls suggest the outcome will be a new chancellor and, likely, a new governing coalition.

Friedrich Merz, a conservative rival of Angela Merkel, is on track to become the next chancellor, though the far-right AfD is expected to make historic gains.

That's what the hard-right nationalist Alternative for Germany (AfD) party firmly believes. It is labelled "radical", "racist" and "anti-democratic" by opponents. Germany's domestic intelligence service says the party is "anti-constitutional".