ATLANTA — The Georgia General Assembly’s approval of a bill would give the state investigative agency stronger police powers over elections by authorizing the statewide agency to launch investigations into allegations of fraud. The legislation, which passed on Monday, would authorize the Georgia Bureau of Investigation to investigate any potential infractions that could have put the results of an election in doubt. The GBI’s law enforcement authority would overlap with election investigators in the secretary of state’s office, which would also continue to look into election infractions. “This …