An attempt to hijack the state's election laws and open the door for voter fraud failed at the last minute this week in Wisconsin's legislature. But threats to ballot integrity continue in other states, and Congress may rush to pass ill-conceived legislation this year that would only sow confusion and increase the potential for chaos on a national level. Wisconsin's story shows how high the stakes are. Late in March, a 72-page bill was suddenly introduced and rushed forward with only abbreviated hearings. The bill would have given "nationally recognized" community organizing groups access to the state driver's license database...