With the Iowa caucuses less than two weeks away, Republican candidates are stopping a nothing  – including soliciting the help of past and present political heavyweights – to convince voters why they are the one to defeat President Obama next fall. But many analysts are starting to ask if these endorsements have any real impact.

All of the top GOP candidates, including Mitt Romney, Newt Gingrich, Ron Paul, Michele Bachmann, Rick Perry and Rick Santorum can lay claim to a list of endorsements.

Romney, who also sought the Republican nomination in 2008, has the longer list of political rock stars that includes New Jersey Governor Chris Christie, former Senator Bob Dole, South Carolina Governor Nikki Haley and a host of other national and state elected leaders.

Earlier this week, and in an effort to mobilize Christian voters to get behind a single candidate, noted evangelical leader Bob Vander Plaats endorsed former Pennsylvania Senator Rick Santorum; a feat that was overshadowed by his asking Michele Bachmann to quit the race just a few days prior.

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