Germany made mistakes with an open-door policy that saw more than a million migrants enter Germany over the past two years, Finance Minister Wolfgang Schäuble acknowledged on Sunday, but he said Berlin was trying to learn from those missteps.

“We have tried to improve what got away from us in 2015,” Schäuble told the newspaper Welt am Sonntag. “We politicians are human; we also make mistakes. But one can at least learn from them.”

Schäuble is a member of Chancellor Angela Merkel’s conservative Christian Democrats, who have lost support to the anti-immigrant Alternative for Germany (AfD) party over the migration issue, after several attacks carried out by migrants.

The AfD is now poised to become the third largest party in parliament in September national elections.

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