Much of Barack Obama's appeal has always resided in his potential to be a transformative leader. That promise flickered only intermittently during his first four years as President of the United States. This week, as he delivers his second inaugural address, the prospects for stronger and bolder leadership over the next four years appear, on the surface at least, to be limited. November's election produced a landscape in Washington much like that beforehand, with a Democrat President and Democrat Senate but a Republican House of Representatives ready to provide a bulwark of opposition to the White House's agenda. Appearances, however, can be deceptive.
During his first term, President Obama sought to be a leader who would transcend partisan divisions, bringing a divided nation together in the process. What he got was a Congress which, thanks to Republican intransigence and his own inexperience, bordered on being dysfunctional. This prompted a noticeably different tone in his election-night victory speech. The President pledged to reach out to Republicans but said that responsibility lay with them, too. This signalled an intention to use public opinion to shame Congress into action.
This approach has already borne fruit. Mr Obama was able to act decisively to prevent the country tumbling over the so-called fiscal cliff, knowing that polls showed Americans would hold the Republicans responsible for a failure to reach a deal.
Now, he is bringing the same strategy to sweeping gun control measures. Opposition on Capitol Hill from Republicans and some Democrats from conservative states with strong gun traditions means an assault weapons ban, in particular, has little chance of passage. The President knows, however, that popular opinion is firmly on his side following the Connecticut school shootings and other deadly incidents, and calculates Congress will be left with little option.
Speed, as he has noted, is of the essence. Mr Obama must capitalise on the public outrage while his own power, reinforced by a comfortable election victory, is at its height. If he seizes the moment, a tempering of Americans' love affair with guns could well be the major legacy of his second term, just as an overhaul of the country's healthcare was the highlight of his first four years.