In his posthumous memoir, longtime German conservative politician and former finance minister Wolfgang Schäuble details an attempt by fellow Christian Democrats (CDU) to overthrow then-chancellor Angela Merkel during the 2015 refugee crisis. The memoir alleges that a prominent Bavarian politician tried to recruit him as a potential chancellor candidate as part of an effort to replace Merkel. The incident is recounted in an excerpt from the memoir published on Wednesday in the magazine Stern. The book, “Memories: My Life in Politics,” is due to be published next week. Schäuble was the longest-s…