If you had forwarded the e-mail that you had received from the clerk, I would have said it wasn't premeditated. You wrote the e-mail and you attached... You're telling us you didn't read it, but you at least read what you sent, since, in your e-mail, you say the following to Ms. Hamilton: "I thought you may want a peak at this in its infancy." You knew that because the introduction read: "Please find enclosed a copy of the draft report from the Standing Committee.... This draft report will be considered... November 22..." and "This draft report is CONFIDENTIAL..." in bold.
So that appears in the e-mail that you wrote. So you knew very well that it was confidential. You didn't forward the e-mail from the clerk; you forwarded an e-mail to Ms. Hamilton to which you appended the report.
When you say that you didn't read it, I believe you, but when you say it was spontaneous, I say to you that you knew very well that it was confidential. You knew it was a draft because you had read that. That's the situation, isn't it?