David Cay Johnston — taking part in a panel discussion on “The Last Word” Tuesday evening — accused first lady Melania Trump of doing “sneaky porn.” Johnston, host Lawrence O’Donnell and Rachel Maddow were poring over the two pages Maddow made public earlier that evening, when O’Donnell noted Trump “has wages and salary income, which is unusual for someone in his case.” “It could be hers,” Johnston offered. “His wife was a model.”