Germany’s two biggest and most established parties have had a torrid summer, blighted by infighting over immigration that is flaring up again after violent right-wing protests in the eastern city of Chemnitz followed the fatal stabbing of a German man, for which two migrants were arrested.

The survey by pollster Emnid for the weekly newspaper Bild am Sonntag had support for Merkel’s Christian Democratic Union (CDU) and their Bavarian allies, the Christian Social Union (CSU), down by one percentage point on the week to 29%.

In last September’s federal election, the CDU/CSU bloc won 32.9% of the vote.

The poll put support for the SPD down two points to 17%. In the last election, the SPD won 20.5% of the vote.

Their combined score of 46% was the lowest for any CDU/CSU/SPD coalition – a combination that also held power in 2005-09 and 2013-17 – in Emnid’s poll for the Bild am Sonntag. The pollster surveyed 2,472 voters between Aug. 30 and Sept. 5.

Support for the anti-immigration Alternative for Germany (AfD) was unchanged from the previous week at 15%, the poll showed. The far-left Linke gained one point to 10%. The ecologist Greens were unchanged at 14% and the business-friendly Free Democrats (FDP) remained at 9%.

Support for other parties rose two points to 6%.