Washington (CNN) - President Barack Obama's top re-election campaign advisers predict that an extended Republican primary battle will produce a weakened GOP nominee, and that a longer process could drain the independent Republican super PACs of much of their money.

And while top officials continue to focus most of their fire on former Massachusetts Gov. Mitt Romney, one of them did compare new GOP front-runner and former House Speaker Newt Gingrich to the rear end of a monkey.
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