Obviously Mueller knows this. Who is spreading this?
Here from WaPo: By Carol D. Leonnig and Robert Costa May 1 at 8:06 PM
"In a tense meeting in early March with special counsel Robert S. Mueller III, President Trump’s lawyers insisted he had no obligation to talk with federal investigators probing Russia’s interference in the 2016 presidential campaign.
But Mueller responded that he had another option if Trump declined: He could issue a subpoena for the president to appear before a grand jury, according to four people familiar with the encounter."
https://heightline.com/robert-costa-biography-married-wife/
https://twitter.com/CarolLeonnig/status/991051333884108801
OOPS https://twitter.com/intent/tweet?in_reply_to=991077752970403841&original_referer=https://muckrack.com/carol-leonnig