On a visit to pick up California votes and cash, President Obama said in San Francisco on Monday night that "I very much intend to win this election" and implored supporters to redouble their efforts because "we're only going to do it if everybody is almost obsessive for the next 29 days." .....Obama turned to his fiercest supporters on the day when the first major national poll since his presidential debate with GOP nominee Mitt Romney appeared. A national survey of likely voters by the nonpartisan Pew Research Center found Romney leading Obama 49 to 45 percent....It was the first...