We've rarely seen a fortnight like it. Well, at least, not in political circles in Brighton and Hove.

First it was the budget which no one could decide on, then it was the agreement of a historical deal for a seafront tower which could make or break the city for years to come.

Then came the City Deal, which is kind of a big deal once you understand it.

So why, oh why, are the Greens at it again trying to oust their council leader?

Most people celebrate success.

But a small number of seemingly self-loathing individuals in the Green Party seem to value a dour principled approach to optimistic progression.

It's like they are walking around with their heads permanently in the dense mist that descended on the south coast late last week.

For no other reasonable organisation or business would look to get rid of their leader a few days after he or she had led them to three defining victories.

First there was the budget.

Yes, the Greens failed in winning support for a a council tax rise of 4.75% which would trigger a referendum and potentially raise extra cash.

But by stalling a decision, they showed supporters and those with a casual interest that they were prepared to do everything they could to fight off austerity.

It meant for the first time in months all 21 Green councillors were united in their approach - while rumours circulated of splits in the opposition parties.

Then there was the i360, again an issue where the Greens took the lead.

Thanks to their backing, enough people were convinced that handing over £36 million to developers Marks Barfield to build the giant viewing platform was a good idea.

When the time comes to analyse if this was right, most would have moved on.

Their third victory was the City Deal, which promises to deliver so much to the wider area.

In times of economic struggles, how else could thousands of jobs, hundreds of homes and more than £170 million of investment be secured?

With the Greens steering the ship, what was central government idea cooked up by Conservative and Liberal Democrats becomes something which every party could support.

Yet, it was just hours after the document was signed that I heard whispers that council leader Jason Kitcat was to face a challenge from within his own group.

The opponent will be former deputy council leader Phelim MacCafferty, who ducked out of standing against Kitcat a year ago at the height of the bin strike.

According to party insiders, the young pretender does not have the support to make it a close contest.

So quite why he has done it - just 12 months before the next election - is bizarre.

It creates uncertainty, it overshadows the Green successes of recent weeks and gives reeling opponents something to grab on to.

It's just symptomatic of the problems that a party not used to running things faces.

Let's be clear, the majority of Green councillors I envy.

They are smart, they are principled, they are energetic and they relish campaigning.

Most political parties would give a few limbs to have such a bunch of committed individuals.

And most would give those limbs remaining not to have a system where those at the top have as much influence as those at the bottom.

It is this, among other things, which makes the Greens, quite frankly, cool.

But when they won 23 out of 54 seats at the local elections in Brighton and Hove in 2011, you could sense that many of them were horrified.

This was the party of opposition, the party of morals, the party of populism which now had to make some tough decisions.

Some of those elected have grown up, others remain as naive and pig-headedly principled as they day they first became interested in politics.

Even Bob Crow and Tony Benn knew that you could not get everywhere based just on rhetoric.

The city is at a crossroads.

But, despite the obvious challenges and opposition from many, under Green stewardship the city is emerging from the financial gloom relatively unscathed.

If the party rebels can just reel in their rebellious enthusiasm then the party might have some chance of regaining a large proportion of its seats next May.

But if it carries on shooting itself in the foot, then the Greens may be confined to the political graveyard.