The recently published trove of torture documents http://nyti.ms/2iPxDC2 exposing the war crimes of the CIA in using torture as a part of their treatment of prisoners tells a story that reflects badly on the Obama presidency.
Those newly released details from the complete record which was collected by the Senate Intelligence Committee and which is vulnerable to being permanently buried by imposition of a "national security" fiat, by Donald Trump, are part and parcel of the cover-up of torture which makes Obama an accomplice after the fact.
Whatever virtue Barack Obama may have had as President, he will need to answer to history for his political cowardice in refusing to prosecute the perpetrators of torture, including his confessed predecessors, Bush and Cheney, who have written of their endorsement of torture. Obama refused to investigate and ultimately to prosecute saying, "we tortured some folks" and "we need to look forward."
Looking forward is exactly what the founders of the American experiment in democracy were doing in trying to balance the power of the state as over against the rights of citizens. They did not assume that those who would follow them in office and in power would always be wise or even virtuous. They distrusted the centralisation of power in the Executive and made that office one of carrying out the people's will in the form of their representative bodies.
Obama's arrogance or false optimism allowed him to underestimate the partisan opposition he faced to his own domestic programmes.