Muckraker Sampson Explains Rove’s Role in U.S. Attorney Nomination by Paul Kiel 03.29.07 | 2:54 pm 0 Watch Kyle Sampson thread the needle on Karl Rove’s involvement in the appointment of his former aide Timothy Griffin to be the U.S. Attorney for Eastern Arkansas. Send Tips Paul Kiel is a former TPM reporter who covers covers business and consumer finance for ProPublica.