We have received testimony from some of the nation's leading scholars and historians, who agree that impeachable offenses are those which are abuses of presidential power that undermine the structure of functioning of government or constitutional liberty.

CNN: Transcript: Opening statement of Rep. Nadler

The fragmentation of power produced by the structure of our Government is central to liberty, and when we destroy it, we place liberty at peril.

FORBES: The individual mandate as a tax: what the Court said

Therefore, the only sure way to protect individual liberty against the encroachments of the state is to structure society so as to afford each individual the maximum opportunity to exit, a realistic chance to flee the jurisdiction of any community that is making collective decisions through a decision mechanism requiring less than unanimous consent.

FORBES: Restoring a Balance of Power Between Individuals and the State