Sen. Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.), a close friend of the late Sen. John McCain John Sidney McCainCindy McCain endorses Biden: He's only candidate 'who stands up for our values' Biden says Cindy McCain will endorse him Biden's six best bets in 2016 Trump states MORE (R-Ariz.), reportedly invited Ivanka Trump Ivana (Ivanka) Marie TrumpSpecial counsel investigating DeVos for potential Hatch Act violation: report Trump, Biden vie for Minnesota Trump luxury properties have charged US government .1M since inauguration: report MORE to McCain’s funeral in Washington on Saturday.

Graham invited Trump after she offered him her condolences this week during a meeting on Capitol Hill, The New York Times reported. A White House official who spoke to the Times on the condition of anonymity said Graham cleared Trump's invitation with McCain's wife, Cindy McCain.

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Before his death, McCain specifically requested Trump's father, President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE, not be invited to attend his funeral.

McCain and the president frequently clashed during his administration and on the campaign trail prior to Trump's election.

Shortly after announcing his candidacy, Trump denounced McCain's service in the Vietnam War, famously saying "He was a war hero because he was captured. I like people who weren't captured." McCain was tortured as a prisoner of war in Vietnam for more than five years.

Trump also repeatedly lashed out at McCain for breaking with his party last year to vote against a GOP repeal of the Affordable Care Act.

McCain, in turn, criticized many of the president’s policies on foreign and domestic issues, as well as his rhetoric toward the media.

McCain died on Aug. 25 at age 81, a year after being diagnosed with an aggressive form of brain cancer. He was widely regarded as a "maverick" and "hero" by those across the political spectrum during his decades-long career as a senator.

The president tweeted about trade and special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's probe into possible ties between his campaign and Russia during McCain's funeral on Saturday morning. He spent Saturday afternoon at his golf club in Northern Virginia.