Khizr Khan, the Gold Star father who took on President TrumpDonald John TrumpHouse Dems demand Barr cancel 'inappropriate' press conference on Mueller report DOJ plans to release 'lightly redacted' version of Mueller report Thursday: WaPo Nadler accuses Barr of 'unprecedented steps' to 'spin' Mueller report MORE during a speech at the 2016 Democratic National Convention, on Monday criticized Trump for attacking the late Sen. John McCainJohn Sidney McCainTrump gives nod to vulnerable GOP Sen. McSally with bill signing Democrats need a 'celebrity' candidate — and it's not Biden or Sanders Juan Williams: The high price of working for Trump MORE (R-Ariz.).

During an interview on ABC's "The View" with McCain's daughter, Meghan McCain, Khan called Trump a "Russian-tainted president" and said the U.S. has "been elevated" because of McCain.

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“How dare this Russian-tainted president disrespects our hero? Senator McCain has meant so much to this nation because of his sacrifice, because of his family’s sacrifice and service. We have been elevated because of his family and Senator McCain," Khan said. 

Khan also recommended that Trump read part of McCain's book, "Why Courage Matters: A Way to a Braver Life."

“This president forgot to read the chapter that teaches how to be commander in chief of the United States. Somebody should read it to him … so that he could learn to take care of those who have sacrificed so much," Khan said. 

Meghan McCain thanked Khan for his "bravery and kind words" in a tweet Monday.

Trump several times last week attacked the late Arizona senator, who died last year. The president went after McCain in a series of tweets, told reporters that he "was never a fan of John McCain and I never will be" and complained during a White House event about not receiving a “thank you” for approving the senator's funeral arrangements.

Trump also previously sparred with Khan, who during his 2016 speech said Trump “consistently smears the character of Muslims." Trump responded by saying in an interview that Khan, who is the father of a slain Muslim soldier, gave the entire speech because the solider's mother wasn't "allowed" to speak.