It’s been a bad month for German chancellor Angela Merkel, whose approval ratings fell sharply last month, a ZDF poll showed on Friday, in the second sign of a voter backlash to her refugee policy since Islamist militant attacks in Germany last month. With one year to go until Germany’s federal election, the poll gave Merkel an approval rating of 1.0, down from 1.4 in July on a scale of 5.0 to -5.0.