About halfway through the ad, a narrator says of Trump, "He'll stop illegal immigration by building a wall on our southern border that Mexico will pay for." Video footage shows dozens of people streaming across the border, as if they were ants fleeing an anthill....The clear suggestion is that the footage is of the "southern border" between the United States and Mexico. But it’s not -- it’s 5,000 miles away, in a small Spanish enclave on the mainland of Morocco.....Trump’s television ad purports to show Mexicans swarming over "our southern border." However, the footage used to support this point actually shows African migrants streaming over a border fence between Morocco and the Spanish enclave of Melilla, more than 5,000 miles away. We rate the claim Pants on Fire.