Love the setting idea. Should give you a lot to work with. H1T1 alone, got me giggling.
Couple of points.
Any memo, or official document like that, should use very formal and official language and structure. My dear Mr President, sounds like something a nutty fan would write, less something that'd be sent from an associate. Of course, this means that when shit hits the fan and a document is off-key of an official, polite stance, it makes it that much more powerful. Or if one person alone is a filth-monster, and the rest just try to pretend that the swearing and yelling is perfectly normal behaviour.
Relating to the previous, remember that this isn't CSI - one person doesn't do everything. A message from a lab scientist detailing information about the virus, and commenting that it may mutate to become airborne, is a lot more effective then one from an aide, regardless how credentialled.
Spelling and sentence construction don't appear to be your strongest suit. Throw paragraphs into a spellchecker to help with the first, and have a lot of eyes looking over it when it's getting close to publish, to fix the second.
As some in the thread have already stated, this is an emotionally charged issue, this political candidate. If it grabs your muse, and you can convey an interesting story from this germ of an idea, all the better. But, remember that there's good and bad ways to do everything. If this is to set up Trump as a strawman, and beat the crap out of him and his points, then going completely over the top is a good start. Swift wrote his A Modest Proposal to highlight the poor conditions in Ireland. He didn't say, Things are terrible, and the English are largely to blame (or at least some policies). No, he instead came up with the 'proposal' of English buying and eating Irish babies. See the difference? It'd be hard to take the second one seriously, whereas the first is a little soapbox-y. (Okay, people DID think Swift was being serious, but that's cause duhhhhhh). So, Trump releasing H1T1 to make zombies, that's Soapboxy. Trump delivers H1T1 as an innoculation booster to schools, orphanages, child pageants and hospitals, that's hilariously evil.
Anyway, that's my soapbox and points. I hope they come across as points of concern, and ways to diffuse them, rather then outright bashing. Looking forward to reading what you write, cause the premise is comedy gold.