It's no secret the Republicans think President Obama is vulnerable in next year's election. They think he overreached on the healthcare overhaul, the economy is still sluggish and they're confident voters agree with them that the federal government spends too much. A lot of possible contenders are acting like candidates, including former Governor Tim Pawlenty and Congresswoman Michele Bachmann. But so far, no high profile Republicans have announced they're running, and some analysts say the party is having an unusually difficult time getting behind a candidate. Mark Zdechlik reports.