German Finance Minister Wolfgang Schäuble warned Britain in a Sunday newspaper interview against “blackmailing” its EU partners in a bid to bring powers back home from Brussels. “We want to keep Britain in the EU and not force it out,” Schäuble told the Frankfurter Allgemeine Sonntagszeitung. “But I will also say that does not mean anyone can blackmail us.” Asked whether a debate raging in Britain about a possible referendum on the country’s future in the 27-member bloc was “dangerous”, Schäuble said the European Union needed to be sending a clear message to the rest of the world. …