This is a comment that Mrs. Obama has repeated several times. And she has neglected to mention workers of any other complexion.Obama said the White House "was built by slaves." Strictly speaking, the White House was not exclusively built by slaves; it was built by a combination of slaves, free blacks and whites. But slaves were significantly involved in the construction of the White House, so we have no quarrel with the way Obama worded her claim. We rate it True.
Wouldn't a PolitiFact rating of "Mostly True" or "Partly True" been more accurate?
What would they make of some other politician's claim that the US "was built by white people," (or "by Christians") who certainly were significantly involved in the construction of the US? I'd guess it would merit their "Pants on Fire" rating for falsehood.
My primary point is that PolitiFact is in the business of "context" and often has a PC viewpoint.
IMO, the NYTimes got it right in their headline: Yes, Slaves Did Help Build the White House