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Are these figures accurate?
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These figures are meaningless, because while "campaign promise" functions grammatically as a countable noun, it functions politically as uncountable.
To take just one example, does Obamacare count as keeping a promise to address the number of uninsured Americans, or breaking a promise to let you keep your doctor, or two promises (one kept, one broken). It's a 2000 page law, virtually every single paragraph in there can be matched to multiple political statements made by Obama or his spokespeople and determined to either keep or break the promise made.
Since there is no consistency in the size of the promises being counted, nor in the amount of legislation required to "keep" one, trying to compare the resulting counts is an exercise in futility. Or rather, it is an exercise in opinion and not in fact.
Skeptics doesn't analyze opinions, only factual claims, and there are none here.