An hour after she gave a speech calling for the impeachment of President Barack Obama, Sarah Palin was only halfway across the lobby of the Grand Hyatt Hotel in Downtown Denver, mobbed by many of the more than 3,000 attendees of the fifth annual Western Conservative Summit there. Walled-in by recording cell phones, tablets, and long-lens cameras, Palin gave an endless series of sometimes repeat hugs, smiled for the cameras, and thanked those around her for “having her back.”