There was no ambiguity in opposition leader Sam Rainsy’s announcement on Saturday that he is coming back to Cambodia before the national election on July 28, and promising to sacrifice his life to “rescue the nation from destruction.” But Mr. Rainsy has a history of mak*ing—and breaking—pledges. Earlier this year, Mr. Rainsy said his party would boycott the national election if a series of reforms were not made to the country’s electoral system, including the creation of a new voter list and restructuring of the National Election Committee (NEC), which is currently stacked with members of the CPP.