1. His MPs hustled him away and stashed him with the mops and things.
2. The RCMP trained him to hide.
3. He's gets to see all the intelligence that no one else does so he alone understands the nature of the threats he faces and hid accordingly.
4. And lastly, he's simply too important to die.
"One of the things you try and do is conceal yourself if you can, but obviously the best situation is to exit," Harper said, adding the goal is for the prime minister to be able to continue to run the government.Well, on the first and second counts, maybe. But then that suggests, especially in the context of third and fourth counts, the rest of his MPs and staff are, shall we say, expendable. Pity he didn't bother to share his apparently unique knowledge of threats with the rest of his caucus or the Oppositon. Not important enough, I guess.
None of that changes the fact that he hid in the cupboard while his peers faced death and he is now making excuses.