The members of the House & Senate who signed the “Taxpayer Protection" pledge to Grover Norquist, have violated the "true faith and allegiance" component of their Oath of Office, by supplanting the will of the people of the United States of America for the will and financial support of a lobbyist.
Their pledge, to a lobbyist, is in effect an open declaration of treason, proclaiming they will evade their sworn obligation to "faithfully discharge the duties of the office", by placing the will of the lobbyist above the will of the people, for personal gain, in the form of financial contributions and other support from the lobbyist.
Their loyalty has been purchased by the lobbyist; therefor, they cannot and will not "faithfully discharge the duties of the office" to which they were elected.