David Corn of the Nation magazine joins us with the latest on the trial of Vice President Dick Cheney’s former chief of staff, Lewis “Scooter" Libby. Former Time Magazine reporter Matt Cooper testified Wednesday that it was President Bush’s political advisor, Karl Rove, who first revealed the CIA status of Valerie Plame. Cooper follows former New York Times reporter Judith Miller, who acknowledged she had conversations with other government officials and could not be “absolutely certain” that she first heard about Plame from Libby. [includes rush transcript]

We end today’s program with the latest on the trial of Vice President Dick Cheney’s former chief of staff, Lewis “Scooter" Libby. Former Time Magazine reporter Matt Cooper testified Wednesday that it was President Bush’s political advisor, Karl Rove, who first revealed the CIA status of Valerie Plame. Cooper is the second reporter to testify at Libby’s perjury and obstruction trial. On Tuesday, former New York Times reporter Judith Miller was called to the witness stand. In her second day of testimony, Miller acknowledged that she had conversations with other government officials and could not be “absolutely certain” that she first heard about Plame from Libby. One of Libby’s lawyers told the judge that the defense plans to call the managing editor of the New York Times, Jill Abramson, to discredit Miller.

The government’s other witnesses who have testified in the trial so far include Ari Fleischer, the former White House Press Secretary and Catherine Martin, Dick Cheney’s former spokesperson. Special prosecutor Patrick Fitzgerald said Wednesday that the government expected to finish presenting its case early next week.

David Corn has been closely following this story.

• David Corn. Washington Editor of The Nation magazine. He is co-author of the new book, “Hubris: The Inside Story of Spin, Scandal, and the Selling of the Iraq War," with Michael Isikoff. He is also the author of the blog Capital Games.