Politics today is marked by pressure at borders, in parliaments and within party ranks. In Spain, thousands of migrants surged into Ceuta from Morocco, overwhelming local authorities and prompting Madrid to deploy the military to shore up the enclave’s border. In New Zealand, Foreign Minister Winston Peters is under fierce criticism at home and formal complaint from Beijing after telling a China-born MP to “go back to your own country,” a remark that has reignited debate over race, diplomacy and political conduct. In Washington, Donald Trump is escalating his fight with Republican holdouts, threatening to pull Todd Blanche’s attorney general nomination rather than make concessions. In Britain, Diane Abbott has been readmitted to Labour after a year-long suspension, closing one chapter of a long-running internal dispute. And in Poland, investigators are examining a crater and debris from what Prime Minister Donald Tusk says appears to be a Russian missile, underscoring the insecurity along NATO’s eastern edge.