http://mediamatters.org/research/2016/09/21/trump-s-11-biggest-lies-debate-moderators-should-be-prepared-address/213234
"Independent fact-checking services have found that 70 percent of Republican presidential nominee Donald Trump’s statements are “mostly false,” “false,” or “pants on fire” lies. As the candidates prepare to face off in the presidential debates, debate moderators must be aware of, and prepared to address, Trump’s biggest and most common lies that have been debunked time and again."