Weeks away from the first debates of the Republican presidential primary and the pool of candidates is uncertain and getting smaller, leaving open the possibility of a much tinier and less predictable field than was widely expected.
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It's more than just hesitance among potential contenders to form an exploratory committee or formally announce a campaign. Few, if any, observers doubt Mitt Romney and Tim Pawlenty will hop in the race, for example. But the two potential candidates with arguably the largest group of core supporters, Sarah Palin and Mike Huckabee, are sending mixed signals about a possible run, with major implications for the rest of the field.