Hilary finds it much easier to mock her opponent than to address her irresponsible and arrogant abuse of confidential and secret documents that would have resulted for jail terms for less powerful persons.  Argumentum ad hominem is much easier than answering to America for Benghazi. "What does it matter?"  She represents the old way of doing politics in America.  She sows fear and ridicule rather than the fact that she is totally tied to the interests that have been driving this country to ruin.