Trump's recent attack on McCain, who passed away in August, is the latest in his years-long offensive feud against the late senator, this time targeting McCain's ties to the controversial Russia dossier and his vote against repealing Obamacare.
Starr called the dossier "a very dark stain" against McCain in an interview Saturday on Fox News, but also called McCain "a great man" and "an American hero."
McCain associate and former State Department diplomat David Kramer received copies of the dossier in 2016 and shared it with a reporter at BuzzFeed, according to court records. BuzzFeed then published the dossier in full, following CNN reports that President Barack Obama and President-elect Trump had been briefed about it.
McCain denied giving the dossier to BuzzFeed in a 2017 interview with the Daily Callerbut did acknowledge providing it to the FBI. He provided a copy of the unconfirmed memos to then-FBI Director James Comey.
"He had far worse 'stains' than this," Trump continued, "including thumbs down on repeal and replace after years of campaigning to repeal and replace!"
Meghan McCain did not mince words in her response, accusing Trump of being fixated on her father's legacy.
CNN's Nikki Carvajal contributed to this report.