Demagogue (noun)

A political leader who seeks support by appealing to popular desires and prejudices rather than by using rational argument.

Origin:

From the greek words "dēmos" meaning "people" and "agōgos" meaning "leader".

Examples:

1. He was accused of being a demagogue.
2. The politician was a demagogue who promised everything to everyone.
3. The demagogue was able to gain the support of the masses.
4. The demagogue promised to make the country great again.
5. The demagogue's speeches were filled with emotional appeals and lacked substance.