I have yet to see one story from any source, left, right or center, that says anything other than that a political science professor -- again, not a journalist -- Tweeted a satirical quote from the Colluder in Chief; that Individual-1 responded; and that the prof then apologized. No one "bought into it."
The standard for libel is quite high. For one thing it does not apply to public figures. For another it does not apply to jokes. F'rinstance whatever Kathy Griffin did with that blood running from the whatever photo, she did not commit libel. Next case.






