The U.S. government is once again taking an eraser to big merger plans between Staples and Office Depot.

The Federal Trade Commission announced a challenge on Monday to the $6.3 billion acquisition of Office Depot (ODP) by rival Staples (SPLS). The agency successfully blocked a merger of the two office suppliers back in 1997.

In the current action, the FTC argues that the Staples and Office Depot combination would violate antitrust laws by “significantly reducing competition nationwide.” Read more – The APWU covers this article as well.