The Justice Department has signed off on Virginia’s new voter ID law, Gov. Robert F. McDonnell (R) said Monday night, in a decision that clears the way for the bitterly contested measure to take effect in time for Election Day. “The legislation I signed into law is a practical and reasonable step to make our elections more secure while also ensuring access to the ballot box for all qualified voters,” McDonnell said. “It is welcome news that DOJ has recognized the compliance of this legislation with the Voting Rights Act.” The Justice Department review was needed because Virginia has a history of voter discrimination. It is is one of 16 states that must receive federal approval before changing voting laws. The states must prove to the federal government that any new statutes would not discriminate against minorities.