One promising line would be to say that he is playing a cheap trick because of a temporary blip in the opinion polls and because he knows that much worse economic weather is on the way. We could say that this makes him look rather shabby and not at all the statesman he likes to pretend to be.
Except that we can't say that.
Because when Brown first became prime minister the Liberal Democrats greeted him with the following press release:
Menzies Campbell today called for a general election as Gordon Brown succeeded Tony Blair as Prime MinisterI could not see any sense in this at the time. The British constitution is not a presidential one. If someone becomes prime minister between elections and enjoys majority support in the Commons he is under no compulsion - legal or moral - to call an immediate general election. Indeed, the more thoughtful voices in the party have been rediscovering our support for fixed-term parliaments.
The Liberal Democrat leader said that Brown ‘does not have a mandate’ and that the country needs more than just a change in personnel.
In fact I have some sympathy for the commentator who suggested that if Brown turns up at the Palace asking for a dissolution, the Queen should point out that he has a comfortable Commons majority and more than two and a half years for the parliament to run, and then tell him to get on with governing.
Nor do I get the impression that we Lib Dems are particularly keen on an early election or feel that it will be in our interest.
I do hope that this gimmicky press release will not come back to haunt us in the weeks ahead.