In naming an emergency manager for Atlantic City on Thursday, New Jersey Gov. Chris Christie left the door open for the seaside gambling resort to file for bankruptcy if it can’t get its finances under control. The Republican governor and likely presidential candidate appointed a corporate turnaround specialist as the city’s emergency manager, and tabbed the man who led Detroit through its municipal bankruptcy as his assistant. Corporate finance consultant Kevin Lavin will have broad powers over Atlantic City’s finances and operations. Kevyn Orr, who helped lead Detroit through a financial crisis, will serve as special counsel to Lavin. Christie...