The honeymoon is over. For the last few months Liberal Democrats have been able to project their hopeful expectations onto Tim Farron, their new leader. And he skilfully avoided disappointing them. But his decision to back the government in last night's vote to involve British forces in attacks on Islamic State in Syria has changed all that. Now, alongside the traumas of the Labour Party, we are asking what political parties are for, and how politics should work.
I was surprised at Tim's decision. As my last posting shows, I was personally inching towards that view - but I consider myself to be something of an outlier in Lib Dem circles. The party at large is clearly against intervention, as a recent online poll showed. My Facebook timeline showed strong opinions against. And he had given himself plenty of cover. He had set five tests against which to judge any proposal to intervene. This is usually a political tactic to oppose something. And, to put it kindly, it is stretch to say that all five tests have been met - though it is also true that there has been movement in the right direction.
My doubts over intervention were not helped by David Cameron, the Prime Minister in today's parliamentary debate. First he suggested that the attacks were needed to prevent IS activity in Britain. They will make very little difference; that is just not how these things work. Then he tried to suggest that there were about 70,000 "moderate" fighters who might act as the ground spearhead to defeat IS, without invoking the Syrian government under Bashar al-Assad. Even if the numbers are right, they do not form a coherent fighting force with the military skill to take on the highly effective IS army. And thirdly, it came out that he had smeared some of his opponents as terrorist sympathisers. That was the previous night in a "private" meeting with his party's MPs - and it alludes to some of the new Labour leadership's apparent sympathy for "freedom struggles" in the past. He might have graciously apologised, but he did not. As Jeremy Corbyn, Labour's leader, said, it diminishes the office of Prime Minister. But it is a foretaste of Conservative tactics against the new model Labour party.
Mr Corbyn, on the other hand, was a model of dignity. There was no high-flown rhetoric, but at least what he said was clearly true. And if it was also beside the point, the same can be said of Mr Cameron. The reason why there is a momentum in favour of intervention, at least in parliament, is that there is s strong public mood to "do something" after the Paris attacks, that a gesture of solidarity with France will have diplomatic benefits, and that with Syria creating a massive refugee crisis, it is not a political topic we can turn our back on. Inaction seems to pose just as big problems as action. If it is good enough for the Germans, whose government is planning to commit forces to the same campaign, almost without precedent, that surely it is good enough for the UK? The fact that the proposed British contribution is small scale is actually in its favour - a lot of diplomatic bang for quite a small buck. Iraq this is not.
This is what politics is about. Weighty issues for which there are no obvious solutions, and where messy compromises are needed. It is about politicians from across the country and different political persuasions, working out what the country as a whole should do. The trouble is that there seems to be a new politics about, where political representatives are seen as figureheads for wider movements of like-minded people, for whom compromise is betraying your principles. The Labour Party is being overwhelmed by this conception of politics. Labour activists oppose intervention in Syria, and have turned it into a totem issue. They have been harassing any MPs and their staffs who take a different view. Some talk of rooting them out as "scum".
Such are the death throws of a party that once aspired to govern. After being hammered for entering coalition, the Lib Dems can safely put such aspirations to one side. The behaviour of their MPs is more of a puzzle - though Tim's leadership opponent Norman Lamb, and one other of the eight MPs voted against. Many of the party's members have similar views to those Labour activists, though standards of behaviour and language are infinitely better. There has been much talk of rebuilding a core vote - which seems to be code for ignoring messy compromises and attracting the support of more motivated, middle class liberals. But Tim Farron and his fellow MPs seem to have an older view of what MPs are for. They seem to have considered the vote on its merits, rather on any wider political impact. (I will say the same for Norman, incidentally. The differences between the two men are a complete reversal of what was said about them in the leadership contest, when Tim was portrayed as being to Norman's left).
That wider political impact is hard to judge. Coming out in favour of intervention is the sort of thing that will play well with floating voters. But it will be hard for the party to get any credit for it. They famously opposed the Iraq war, so people will expect them to oppose all military interventions. They will just get confused when they do something different. And the party's members and activists will not be happy. Some could leave, others just drift away.
It may too much to hope that the party will take this as a lesson on what successful politics must look like. Political representatives are responsible to their voters first, and party membership second. It is not "democratic" for a bunch of self selected activists to agree something using voting procedures, and then impose this on people elected in proper, public elections. Getting things done means compromise and lending support to policies that are second best or worse. This is why we use a system of representative democracy. Political movements not prepared to engage fully with the real business politics ultimately get nowhere. - or if they do get somewhere, end up by forcing their views on others and suffocating political debate.
Unlike what the Labour Party is becoming (and, it has to be said, a lot of what it was of old, for different reasons), the SNP or the Greens I hope the Liberal Democrats will understand this and give their leader some slack. But this will prove a painful coming of age for him.