I agree that claims like "the earth is flat" and "vaccinations cause autism" should probably be removed - but the trump ad in question while likely to be false, does not constitute an outright falsehood. If you ask anyone on the right they'll say it's probably true and at the very least just as truthful as any leftist political ad.

Furthermore, in the 1400s an ad claiming that the world is round would have been deemed outright false, and in the early 1900s an ad claiming equality between all races would have been deemed outright false, and in 2001 an ad claiming that Iraq had no WMDs would have been deemed outright false -- yet all are now known to be true.