Because the FACT Trump voters refuse to acknowledge is that unemployment has gone down under the Obama administration. When measuring apples to apples, the FACT is that unemployment has gone down under the Obama administration. It doesn't really matter if you prefer to compare oranges to oranges, the FACT remains that unemployment has gone down under the Obama administration.
Ravensky, let me draw your attention to four facts.
1. Telling me something is a fact three times does not make it a fact. Your use of proof-by-repetition doesn't mean you have a case.
2. If a we call a tail a leg, a dog has four legs. Calling a tail a leg does not make it one.
3. The circumstance that the government chooses to use the word "unemployment" to refer to a quantity it calculates by deliberately ignoring some categories of jobless people has no power to magically make others who don't choose to ignore all of those people when they use the word "unemployment" into people who are "incapable of acknowledging facts." Agreeing to speak and to think in terms of some government's Newspeak vocabulary is not one of the requirements for qualifying as a fact-acknowledging person. To imply that it is one of the requirements is illogical.
4. When you call "unemployment has gone down under the Obama administration" a FACT, you are playing a word game. You could say "The U3 rate has gone down under the Obama administration." That would be a fact. But pointing out that joblessness has increased under the Obama administration does not make a person guilty of denying that the U3 rate has gone down. When you make believe that it does -- when you treat "unemployment" and "the U3 rate" as synonyms, not in your own speech but in the speech of those you are condemning, you are committing an equivocation fallacy.