Poland’s parliament has approved the government of newly elected Prime Minister Donald Tusk in a vote of confidence, a final step in a change of power that will have ripple effects across Europe. Tusk, a centrist leader who previously served as prime minister of the EU country from 2007 to 2014, was appointed as the new head of government by parliament on Monday, ending eight years of rule by conservative populists who frequently clashed with Brussels. His three-way coalition government needed to pass a vote of confidence, which it secured on Tuesday night. Of the 449 lawmakers present in the …