President Obama’s high-profile handshake with Cuban President Raúl Castro at Nelson Mandela’s memorial service in Johannesburg was unplanned, according to the White House. Both leaders were invited to speak and briefly greeted one another as Obama approached the podium. The Cuban government said the friendly move could mark a new phase in U.S.-Cuban relations. Some Republicans have criticized the gesture, claiming that it represents a victory for the Cuban dictatorship. Even in death, Mandela seems to inspire high-profile reconciliation.