amazed there are people on FR who claim not to know about this.
here Graham allegedly also gives his copy of the dossier to the FBI:
25 Mar 2019: CNN: Graham encouraged McCain to turn Trump-Russia dossier over to FBI
by Manu Raju; CNN’s Katelyn Polantz contributed to this report.
GOP Sen. Lindsey Graham said Monday that he told the late Sen. John McCain to turn over the dossier of Trump-Russia allegations to the FBI, pushing back against President Donald Trump’s assertions that the Arizona Republican helped fan the flames of the Russia investigation.
Graham told CNN after a news conference that he told Trump in Florida this weekend that “Sen. McCain deserves better” than the way the President has been publicly disparaging the late senator and war hero in the last week. And Graham publicly acknowledged he had advanced knowledge of the dossier, the existence of which has enraged the President...
Graham added: “I told the President it was not John McCain. I know because John McCain showed me the dossier. And I told him the only thing I knew to do with it, it could be a bunch of garbage, it could be true, who knows? Turn it over to somebody who’s job it is to find these things out and John McCain acted appropriately.”
***Asked more about the matter later, Graham said he put the dossier in “a safe” the day he got it and turned it over to the FBI the next day...
“And I understand that, clearly people are in the McCain world that did some things inappropriate but it was not John McCain. John McCain did not give it to anybody in the press, he talked to me just as soon as he got it, and he turned it over to the FBI and that’s exactly what he should have done.”...
https://edition.cnn.com/2019/03/25/politics/lindsey-graham-john-mccain-dossier-fbi/index.html