Looks like we will soon be hearing the testimony from the former Justice Department liaison to the White House:

A federal judge today ordered a former aide to Attorney General Alberto R. Gonzales to testify in Congress about the firings of U.S. attorneys, granting her limited immunity from prosecution so she can tell the committee what she knows.

Under the order from U.S. District Chief Judge Thomas F. Hogan of the District of Columbia, Monica M. Goodling "may not refuse to testify, and may not refuse to provide other information" if asked by Congress.