Lawyers for Bernard Kerik, the disgraced and indicted former NYPD commissioner, demand that feds explain how they got his former lawyer to rat him out. The Post reports a "sweeping, pre-trial motion" says that Joseph Tacopina told the governments things Kerik told him "in confidence." However, Tacopina claims nothing he told the feds was in client-lawyer protected conversation. Kerik also complained that he's being targeted for not paying taxes on his nanny while other high-profile......