A well-known fact checker flunked Donald Trump in June for suggesting incorrectly that there are no Chevys in Japan, that the Islamic State has built a hotel in Syria, and that nuclear warheads in the United States are likely inoperable — and all of these fact checks came from a single speech.

Things have only gotten busier for fact-checkers, including FactCheck.org and PolitiFact, as Trump, the 2016 Republican presidential front-runner, has amplified the bluster and grandiose posturing.