demagogue

A political orator or leader, especially in a democratic system, who gains favor by pandering to or exciting the passions and prejudices of the audience rather than by using rational argument.

1938, O'Neill, translating The Knights by Aristophanes, 424 BC, lines 191-193, A demagogue must be neither an educated nor an honest man; he has to be an ignoramus and a rogue.

If the majority of our fellow-citizens are more susceptible to the slogans of fear and race hatred than to those of peaceful accommodation and mutual respect among human beings, our political liberties remain at the mercy of any eloquent and unscrupulous demagogue.

A leader of the people.

To speak or act in the manner of a demagogue; to speak about (an issue) in the manner of a demagogue.

c. 1938, Maury Maverick, The New York Times, quoted in 1970, Richard B. Henderson, Maury Maverick: A Political Biography, page 183, I never demagogued on our serious questions and stood for civil liberties.

On the subject of foreign aid, although it is a relatively unimportant economic category, it is an area of expenditure that has frequently been demagogued and has been a favorite target of politicians during tough times in the domestic economy.