Despite the opposition and his own self-wounding, Obama has compiled a significant record, though not the transformative one he promised. He passed a comprehensive health plan, which, while it remains weak tea compared to other countries' health systems, is a first step and the only successful health reform in 40 years. His bail-out of the banks probably saved the US and the world's financial system. And his careful but muscular use of power in foreign affairs may well reflect the words of Theodore Roosevelt: "speak softly but carry a big stick [or a drone or Seal team 6]."
That said, my most serious reservations concern his unwillingness to address his predecessor's use of torture and of his own extra-constitutional execution of American citizens accused but neither tried nor convicted of terrorism. That precedent is frightening.
Mitt Romney is a shape-shifter who has been on every side of every issue. A moderate as Governor of liberal Massachusetts, who instituted the model for Obama's health care, Romney disavowed the state and his own actions running this year in Republican primaries. He proudly claimed the mantle of "very, very conservative". From a pro-choice supporter of planned parenthood he has morphed into an ardent pro-lifer heading a party whose platform quietly proscribes abortion with no exceptions for rape or incest.
His contempt for 47 per cent of his fellow citizens he labelled as "unwilling to take responsibility for their lives" was expressed privately before wealthy donors. His foreign policy credentials are as slim as Sarah Palin's when he suggests that Iran may want to occupy Syria "to get a path to the sea". Worse is the opportunistic manner he disowned his extreme positions in the days before election.
Occasionally, presidential decisions make history. This year is the 60th anniversary of the Cuban Missile Crisis of October, 1962. The world then stood at the brink of atomic war. Krushchev's caution led to avoiding catastrophe.
But it was Kennedy who held out alone against his generals' advice to attack, a decision that would have led to atomic war. Instead, Kennedy cut deals with Krushchev to end the crisis.
To my fellow Americans still undecided, the question to ask is which of today's candidates would you have wanted with his finger on the button in 1962?