Who said "A leader must lead by example."?

This quote is attributed to Harvey Dent.

A leader must lead by example. - Harvey Dent

"A leader must lead by example."

Harvey Dent Leadership

"The night is darkest just before the dawn."

"I believe in Harvey Dent."

"You either die a hero or live long enough to see yourself become the villain."

"Fairness is the foundation of justice."

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"