Regarding the phrase "CDU-Bürgermeisterin über Umgang mit AfD _ Vertraulich," it appears to refer to a confidential discussion or statement by a female mayor from Germany's Christian Democratic Union (CDU) concerning the party's approach to the far-right Alternative for Germany (AfD). While the exact confidential content is not public, the broader context of the CDU's internal debate and the public positions of its local leaders can be described.