Snugs has it correct. Pandering to Hispanics (note the big cheer when Zero said "Mexicans" in his long list of people who were "here" when the US got started?), he outright lies.
Difficult to know if he improvised that, or if he was following TOTUS to the letter.
Noting that Zero often gets in trouble when he veers from TOTUS, it's entirely possible he winged it and threw the word in just because he's a sniveling, snarking politician who can't be trusted. I'd like to think the speechwriters aren't that stupid.
Aren't they? Bueller......?