As the House prepares to House to vote on holding Attorney General Eric Holder in contempt of Congress on Thursday, Rep. Darrell Issa is stepping up the pressure on President Obama to come clean about any White House involvement in the deadly Fast and Furious gun trafficking operation.

The House Oversight and Government Reform Committee chairman wrote to the president to challenge his use of executive privilege to withhold subpoenaed Fast and Furious documents.

“Either you or your most senior advisors were involved in managing Operation Fast & Furious and the fallout from it … or, you are asserting a Presidential power that you know to be unjustified solely for the purpose of further obstructing a congressional investigation,” Issa wrote. “To date, the White House has steadfastly maintained that it has not had any role in advising the Department with respect to the congressional investigation. The surprising assertion of executive privilege raised the question of whether that is still the case.”

Boom. Pick one, President Obama.