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In page Wolfgang Schäuble:

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Following the elections, Schäuble was mentioned as potential candidate for the office of Federal Minister of Defense.[2] In the subsequent negotiations to form a coalition government, however, he led the CDU/CSU delegation in the working group on interior policy; his co-chair from the SPD was Brigitte Zypries.[3] Once the new government was formed, Schäuble once again became Minister of the Interior, this time in the Grand Coalition under Chancellor Angela Merkel.