Now at the top of the polls as the frontrunner among Republican presidential hopefuls, businessman Herman Cain electrified a crowd of thousands who braved the heat and mosquitoes to see him speak Tuesday night in La Marque. Cain took another leg of his White House bid to the Gulf Greyhound Park, a home of races and gambling, as the headliner of the Clear Lake Tea Party's rally. After a daylong media tour in Houston, Cain's largest public appearance began with a brief book signing with supporters, then he disappeared for two hours while the crowd heard from other speakers, including...