BOSTON – Dr. Evil, Austin Powers' archrival, had a sidekick named “Mini-Me.” The Romney campaign has “Mini-Mitt.” A thumb-sized Romney walks onto the home page of the presidential candidate's Web site, pointing out helpful features before exiting, stage left. “I hope you'll also consider making a contribution to my campaign,” Mini-Mitt says while gesticulating with his arms and hands at the lower right-hand corner of the screen. “With the end of the quarter June 30th, the media is going to pay close attention. A contribution today will help show the strength of my campaign and it'll help me take my...