BERLIN — Her open-door policy for refugees has sparked anger across the Continent and threatened her political standing at home, but German Chancellor Angela Merkel is closing out a turbulent year displaying the same equanimity and maneuvering skills that have marked her decade in power.Ms. Merkel, 61, has tamped down — at least for now — the outrage and a flight of support from her Christian Democratic Union, or CDU, among conservative voters who fear that the approximately 1 million refugees arriving in Europe’s largest economy this year might include terrorists like those who staged mass shootings in Paris last month.
