Ask them to guess who said this:
"The soundest way to raise revenues in the long run is to cut taxes now. The purpose of cutting taxes now is... to achieve the more prosperous, expanding economy which can bring a budget surplus." Ronald Reagan? One of the Bushes? F. A. Hayek? Arthur Laffer?

No: JFK.

Psalms 118:8 It is better to trust in the LORD than to put confidence in man.
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Scarlet Chord Ministries   Isa 1:18