I agree it is a non-story tabloid speculation.
The P-8 seems mostly on track and budget and I would see it as the perfect type of program President Elect Trump would support: It creates/keeps good US jobs, is not overly gold plated, is a sensible adoption of a proven airframe, and is replacing a the Orion which most everyone agrees is in need of replacement.
The Foreign Military Sales angle is likely not an issue either. I don't think the US is directly funding the UK P-8 buy. I believe Mr. Trump will likely pursue positive relations with the UK, and will be happy with the UK buying all sorts of systems.