Outsourcing reality checks to private organizations is a serious problem with 21st century America. The Southern Poverty Law Center is another similar org that is treated as authoritative yet has zero safeguards or unbiased processes.
What is your solution? Every single source of news, every last one, will have perhaps 1/3 or more of the population calling it fake news.
If you are the secondary source, you should of course include your references. If you're the primary source (e.g. you're quoting anonymous administration officials), feel free to declare it a fact; people shouldn't just believe you, but putting your reputation on the line is actually a good signal to me (contingent on said reputation.)