This post was written by CBS News Legal Analyst Andrew Cohen.

(CBS)
Now
here is a big story at the intersection of law and politics. Newsweek’s Michael Isikoff
reports that on January 16, 2009, just four days before the end of the Bush Presidency, White House Counsel Fred Fielding instructed former administration officials Karl Rove, Harriet Miers, and Joshua Bolten to continue to assert “executive privilege” to avoid answering questions under oath from Congress about the U.S. Attorney matter.
The extraordinary instructions — some legal experts say they were unprecedented - presage perhaps the first great constitutional challenge for the Obama Administration. That’s because the House Judiciary Committee, led by the powerful and dogged John Conyers (D-Mich.), has indicated that it will continue as it has for years now to press ahead with its efforts to force Rove and Company to account for their influences on political hiring at the Justice Department.
If Conyers doesn’t give in, and why would he now that he has the votes, we’ll see a lawsuit in federal court seeking judicial guidance on the scope of the privilege. And if we see such a lawsuit – issue presented: may an outgoing administration block its officials from testifying for all time into the future despite a Congressional subpoena? – the Obama Administration will have to take a formal position on the issue. It simply couldn’t afford to sit on the sidelines and let the other two branches of government define the breadth and width of
executive privilege.
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