Oh, he knew. But he wasn't trying to end the program. From Holder's April 2, 2009 statement (taken from the linked Washington Times article): "Last week, our administration launched a major new effort to break the backs of the cartels. My department is committing 100 new ATF personnel to the Southwest border in the next 100 days to supplement our ongoing Project Gunrunner, DEA is adding 16 new positions on the border, as well as mobile enforcement teams, and the FBI is creating a new intelligence group focusing on kidnapping and extortion. DHS is making similar commitments, as Secretary Napolitano will detail."
Note this was a "major new effort". He wasn't stopping anything, he was enhancing Gunrunner. Oh, and if it was "new" back on April 2, 2009, how can it be Bush's program, and Bush's fault? Hmmmmm?
Meanwhile, in reality, it's lies...all lies!