Who said "He's too much a leader already."?

This quote is attributed to Graff.

He's too much a leader already. - Graff

"He's too much a leader already."

Graff Leadership

Character in Ender's Game

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"A commander's most important job is to give orders that can be obeyed."

"Humanity does not ask us to be happy. It merely asks us to be brilliant on its behalf."

"You are the hope of humanity."

"The way to win is to find an enemy and defeat him."

"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"