The three-day gathering of the National Governors Association represents the group's final meeting before many state leaders face voters in an election season that will decide the balance of power in statehouses from Nevada to New Hampshire and could end some presidential campaigns before they begin. The vice president's appearance comes as the Obama administration faces criticism about its handling of an influx of Central American children sneaking into the country to escape their violent homelands. The issue has reignited a fierce debate over immigration reform, which has stalled in a gridlocked Congress despite overwhelming support from the White House, the business community, faith leaders and many establishment Republicans. Other topics will likely include education reform and Common Core education standards, which were largely supported by governors of both parties before becoming a popular target of tea party activists. Events on the schedule include a reception at the Country Music Hall of Fame, the iconic Ryman Auditorium, the governor's mansion and a picnic at the Hermitage, President Andrew Jackson's home.