Is this the start of a Tory collapse?

Nice piece by Michael Portillo.

I had concluded, when I left politics, that the Tories were ungovernable and had a death wish. But Cameron is clever and charismatic; I believed he could succeed where I had failed, especially since even the Conservatives might learn something after three landslide defeats.

Now I am not so sure. Cameron has wobbled. Unless he regains control of his party at once, the project will be lost. It would be much better for him to press on even at the risk of being deposed than to settle into the leadership agony of Hague and Howard.

I have always doubted that the Conservatives could win the next election. Now the question in my mind is different: can the Tories ever win again?