“Just old enough to vote”

From Ruthless (dir. Edgar G. Ulmer, 1948). Horace Vendig (Zachary Scott) and Buck Mansfield (Sydney Greenstreet) sit down to negotiate over a drink:

“Excellent whiskey, Mr. Mansfield.”

“Yes, just old enough to vote. [Sips.] The wine of the country, my friend. Bourbon, the name given to kings and whiskey. The kings is gone; the liquor remains.”