There was no better example of this than conservative (and famously socially conservative) South Carolina Senator Jim DeMint's comment in early 2009 that he "would rather have 30 Republicans in the [100-strong] Senate who really believe in principles of limited government, free markets, free people, than to have 60 that don't have a set of beliefs", an expression not of conviction, but of a fanaticism unmoored to any realistic plan for winning back power. When the Tea Party moment dawned, DeMint and others like him jumped in front of the parade, reinforcing the revolutionaries' zeal to purge so-called RINOs (Republicans In Name Only) and throwing some money their way too. To be sure, this has led to the injection of useful new blood into the party's ranks, but it has also led to the selection of some candidates so inept, unsuitable or outright strange that the GOP threw away hopes of winning or retaining a series of crucial senate seats — from Nevada to Delaware to Indiana and beyond — that could have transformed the political calculus of recent years. Regrettably, there are signs — not least in the aftermath of DeMint's move to the Heritage Foundation, formerly the most influential of all the conservative think-tanks — that excesses are not yet through. 

No less destructively, some of the more outlandish candidates on the Right have tarnished the broader Republican image, especially when they have sounded off on social issues. Would-be senator Todd Akin blew his chances of winning a Missouri seat in 2012 when, in defending his opposition to abortion in cases of rape, he explained that victims of "legitimate rape" rarely became pregnant, a view that held some sway in the Middle Ages, but is today something, shall we say, of an outlier in obstetric circles. 

Social issues have for years been essential to the Republican party's ability to compete (there is no majority for the socially liberal, economically conservative programme favoured by libertarian-leaning or many moderate Republicans) but they have come with costs, hitting the party's capacity to attract elite support and its appeal to women (particularly single women), the young and voters in the north-east and west. These costs are likely to rise. Same-sex marriage has won the acceptance of roughly half of all voters, and in another reminder of how the country is changing, roughly a third of all under-30s describe themselves as "religiously unaffiliated" (Pew Research, October 2012), the highest total ever. On the other hand, roughly 50 per cent of Americans now claim to be "pro-life" (Gallup, May 2012), although that's a stance that comes with plenty of loopholes: more than half of these pro-lifers believe that abortion is acceptable under certain circumstances. 

What seems to matter to centrist voters is how social issues are framed. They are prepared to vote for anti-abortion candidates, say, but not for those who push the issue beyond what is rather mistily defined as reasonable, or if they detect a wider agenda at work, such as the distaste for contraception displayed by former senator Rick Santorum, an oddball Beltway Savonarola who enjoyed a brief and alarming surge in the 2012 primaries. When they notice executive competence, as so often they do in the ranks of the GOP's expanding tally of governors (30 in all, close to the record set in the 1920s), they appear to be willing to live with a conservative social agenda so long as it is not pushed à l'outrance. 

So what now? More budget fights in 2014 will enable the Democrats to rekindle memories of this past autumn's shutdown and, with them, images of the Republicans as mad, bad and dangerous to vote for. A dose of class warfare is sure to be on the agenda too. Against that, the fallout from Obamacare's uncertain launch may still be reverberating and the programme's deeper problems may be coming into sharper focus. The economy is likely to be walking rather than running-the labour force participation rate is the number to watch-and a foreign policy foul-up cannot be eliminated. The best guess at the moment is that the midterms will leave matters pretty much as they are now.

The ideological divisions between and within the Right and the remaining "moderates" in the Republican Party, stirred up further by would-be presidential candidates out for primary votes, will mean that a credible alternative to Obamacare and a sound fiscal plan will both remain elusive even after the midterms. Being the "party of no" may well have to do. The longer-term outlook for the GOP will continue to deteriorate, but if "events" co-operate, nay-saying buttressed by at least some ideas on what might replace the ACA could, fingers-crossed, just possibly be enough to do the trick in 2016 if the primary process can avoid the own goals of 2010 and 2012. At the presidential level, the primaries need to avoid attracting the clown posse that we saw last time (Santorum is said to be contemplating another run), or selecting a candidate (Cruz, say, or Kentucky's Senator Paul) too hardline to have any prospect of winning back the White House, a temptation made more difficult to resist (what's to lose?) by the failures of establishment Romney and establishment McCain. Even a more conventionally viable candidate will have to avoid being dragged into unelectability by the positions he has to take to prevail at the primaries. Despite conservative suspicion, some baggage from his past, and an occasionally spiky and difficult personality, Chris Christie might just be tough enough to pull it off. 

But 2016 is a long way off. And then there is Hillary.