Yes, we do take questions here and... revoking McPherson's 1989 Pulitzer would appear to be a long shot.
Philip Nobile raised this revocation matter in connection with three other of the most egregious history plagiarists in 2002 and came up with answers from the Committee that amounted to "We don't look back."
The Committee's decision on the Duranty reporting case is also instructive.
Whatever you may hear, bureaucratic inertia provides a measure of safety to even the worst of the winners. McPherson is likely safe.