First of all, one of the main reasons why projects fail is the lack of support from the top management.
Apparently, not a lot of key people are on board, including the mayor. From what I've read, I feel that the project will certainly fail, not only because the politics at the top level are completely messy, but because I feel that this a program, and not a project, and it is being treated as a project, and, on top of that, it seems that the person who's assigned as a project manager lacks the necessary experience.
If it comes to me, the memo should ask for the cancellation of the project :)
Anyway, I think the memo should be:
"Dear Fred, (it should be sent to Fred because he's the project sponsor)
I think the project has many challenges, most of them I can handle (although I think that she can't), but there is one key challenge that may threaten the project, which is the fierce politics at the the top level. It seems that there are lots of conflicts, some people want to go ahead with the project, others don't. Some people want to help, other won't. I hope you can address all the issues with the stakeholders and ensure that they are all on the same board. I believe that if the issues are not resolved, then we will get conflicting instructions from the different stakeholders, and the project will ultimately fail."