In the following sentence, should "Who", "Whom", "Whoever," or "Whomever" be used in the blank space?: He was not sure ___ he was voting for.
May 9, 2018
"Whom" is the objective form, the target of the action. "Who" is the subjective form, the person performing the action. Since the person being voted form is the target of the action of voting, the objective form is correct.