Because liberals think the rules don't apply to them, dummy.
From the story here about the discovery that Hillary Clinton used a personal email account for government business while Secretary of State, a violation of federal requirements:
Many senior Democrats are angry, though not yet mad enough to publicly confront the Clintons. "This story has legs as long as the election," said a Democrat who has worked on Capitol Hill and as a presidential campaign manager. "She will be tripping over this crap until the cows come home."
