Note on how to spot propaganda: use of the phrase "demolish the East Wing..." is used to get an emotional effect, instead of the more factual "build a new ballroom for the White House" statement.
Whether you want to hide it and ignore the history and praise the ballroom, you alternatively omit the demolish part. Propaganda works for both ways.
It is obvious that demolishing is the first step in new construction, and has been done before to the White House. You can't give all the context in a single sentence. You can avoid bias or wording that attempts to sway the audience (propaganda).
There is no praise or value judgement on the ballroom. The neutral PoV statement is "Microsoft donated to a new ball room for the White House east wing."
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Picture of the East wing today:
https://ichef.bbci.co.uk/ace/standard/1024/cpsprodpb/2089/li...
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This isn't hard.
I mean, it would have been possible to examine the birthday letters of Myhrvold and Trump and a couple of Trump quotations to put the financing into context.