It is quite spectacular how Cameron has collapsed.
A few months ago, he was a great man, a modern Churchill, having won the most audacious electoral comeback in recent history.
Then came his hopeless EU 'renegotiation', George Osborne's incompetent budget (which has possibly ended three political careers - Duncan Smith's, Cameron's and Osborne's - which is quite an impressive achievement), the Panama revelations and his shifty, mealy mouthed responses, and now further dubious looking behaviour with inheritance tax, the humiliation of polling behind Jeremy Corbyn and the possibility of LOSING the show referendum that he set up to placate his internal, anti-EU fifth column ... It's like the collapse of John Major's government, only playing at speed.
He indicated he didn't plan on fighting a third general election, but I imagine he planned on bowing out looking like a man leaving at a time of his choosing, not some family embarrassment being bundled out of the house after raiding the drinks cabinet and smashing an heirloom.
Events, my dear boy, events, as Harold MacMillan may have said.
Labour should take heed of this. By absurd coincidence, they seem to have lighted on the perfect leader for the times. Not because Corbyn is a great leader, but he actually seems to be morally righteous and incorruptable. Just as Blair was the perfect leader for the 90s, almost seeming designed to make charges of Evil Red Intentions impossible, Corbyn is one of very few MPs who can (probably) castigate the Tories for their venality and not come across as an opportunistic hypocrite. No-one can accuse him of adopting left-wing sanctimony as an electoral convenience, or of only being interested in winning power.
(Of course, a Corbyn castigation isn't exactly a terrifying prospect, but I think his unabrasive style is starting to connect with the public.)
Best of all, Corbyn is immune to the tired "Well Labour were in power for eons and did nothing about ..." and "Labour were no better when ..." counter arguments. His position as perennial backbencher and malcontent gives him protection. He had nothing to do with any of it.
Interesting times, and all that.