No, the word less made it perfectly clear. If they had meant less educated-people they would have put fewer as you pointed out. Plus the context of the title made the sentence’s meaning clear. Education level is the predictor, and Republican voters are at one end of the spectrum (less educated) and Democrats are at the other (more educated)
Less educated means lack of schooling not fewer educated people in this sentence.
A hyphen would have made that clearer. (capitalization wouldn’t have hurt either)
less educated-people vote for trump
less-educated people vote for trump
I would have just reworded it if I were writing it.
No, the word less made it perfectly clear. If they had meant less educated-people they would have put fewer as you pointed out. Plus the context of the title made the sentence’s meaning clear. Education level is the predictor, and Republican voters are at one end of the spectrum (less educated) and Democrats are at the other (more educated)