Some of Stephen Bush's political predictions this year have proved uncannily accurate (admittedly he didn't call the general election correctly but was much closer than most), so we should probably take heed of his claim that Corbynistas are increasingly confident of being able to remain in control of the Labour party for the next decade, and that anti-Corbynistas are increasingly despondent about their chances of averting that fate. If that's true, the first thought that occurs to me is that it makes an SDP-style split highly likely at some point between now and 2020. The only reason that Blairites are still rubbishing the idea of a breakaway party is that they're still trying desperately to convince themselves that Corbyn is just a passing nightmare. To use a Daisley-esque analogy, it's a bit like the Arab reaction immediately after the Six Day War - it's initially hard to believe that something that happened so quickly can possibly have such lasting consequences. But it only took Mrs Thatcher a couple of weeks to seize control of the Conservative party from Edward Heath, and nothing was ever the same again. The Tory "wets" eventually accepted that harsh reality, and if the Labour right start to do the same now, it's hard to see how they will reach any other logical conclusion than that their future lies in a different party. It might take a few years to emotionally reconcile themselves to that logic, however.
The second thought that occurs to me is that Bush's belief that Corbynism is safe depends entirely on Corbyn himself not voluntarily standing down. He'll be almost 71 by the time of the next general election, so it's hardly inconceivable that a health or stamina issue might crop up. If he does decide to step aside for any reason, it's far from certain that whoever he anoints as his preferred successor will even get onto the ballot paper in the subsequent leadership election, because he or she would require nominations from 15% of Labour MPs, who won't feel under the same obligation to 'play fair' that they might do if it was a question of renominating Corbyn himself. So I would have thought the left's most urgent internal reform priority should be to give themselves an insurance policy by changing the nomination system. Perhaps the most elegant solution would be to allow nominations from constituency parties to be taken into account.
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You might be interested in Alasdair Soussi's article about the Scotland Bill on the Al Jazeera website, which includes quotes from myself, James Mitchell, Paul Cairney, and (brace yourselves) Duncan Hothersall. You can read it HERE.