Three top-tier GOP presidential hopefuls are likely to emerge, and neither Sarah Palin nor Donald Trump are among them.
Flip through any list of Republicans running for president or probably running or maybe thinking of running, and you'll find at least a couple dozen names. From Mitt Romney and Tim Pawlenty to Michele Bachmann, Rudy Giuliani, and Donald Trump, it's a potentially vast field peppered with outsize personalities and also folks who make you say, "who?"
Why so many?
"Because people perceive vulnerability in President Obama," says Darrell West, a political analyst at the Brookings Institution. "We have high unemployment, we have 2-1/2 wars, and there's a lot of contentiousness surrounding health care. So nobody's afraid to take on a sitting president."
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