Meghan McCain knocks Lindsey Graham for defending Trump's tweets: 'This is not the person I used to know'

“The View” co-host Meghan McCainMeghan Marguerite McCainChelsea Clinton says she's not considering a bid for New York House seat Meghan McCain praises Yang for starting conversation on automation: 'It's incredibly impressive' Meghan McCain: It's 'breaking my heart' Warren is leading Biden in the polls MORE on Monday criticized her father’s longtime friend Sen. Lindsey GrahamLindsey Olin GrahamPelosi, Schumer hit 'flailing' Trump over 'sham ceasefire' deal Pompeo to meet Netanyahu as US alliances questioned Overnight Defense — Presented by Boeing — Pence says Turkey agrees to ceasefire | Senators vow to move forward with Turkey sanctions | Mulvaney walks back comments tying Ukraine aid to 2016 probe MORE (R-S.C.) for standing by President TrumpDonald John TrumpDemocratic senator rips Trump's 'let them fight' remarks: 'Enough is enough' Warren warns Facebook may help reelect Trump 'and profit off of it' Trump touts Turkey cease-fire: 'Sometimes you have to let them fight' MORE after Trump suggested that a group of nonwhite progressive congresswomen "go back" to where they came from. 

McCain called Trump's remarks “old, racist dog whistles” and said she was embarrassed by the lack of Republicans leaders speaking out against the president.

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“Whatever is happening to Lindsey, this is not the person I used to know,” the conservative commentator said.

McCain, the daughter of late Republican Sen. John McCainJohn Sidney McCainLawmakers toast Greta Van Susteren's new show Meghan McCain: It's 'breaking my heart' Warren is leading Biden in the polls The Hill's 12:30 Report: Video depicting Trump killing media, critics draws backlash MORE (Ariz.), has previously described Graham as “like an uncle to me and closest to my political ideology.” 

The ABC talk show host also played a 2015 clip of Graham, now one of the president’s fiercest supporters, calling Trump a “race-baiting xenophobic religious bigot" who didn't represent his Republican Party. 

Meghan McCain reacted by noting that Khizr Khan, the Gold Star father who sparred with Trump during the 2016 presidential race, had a son who died in uniform and wasn’t born in this country.

The president sparked outrage on Sunday morning when he tweeted that unidentified progressive congresswomen "who originally came from countries whose governments are a complete and total catastrophe" should "go back and help fix the totally broken and crime infested places from which they came."

Trump did not identify which lawmakers he was referring to, but the comments were widely interpreted as targeting Democratic Reps. Alexandria Ocasio-CortezAlexandria Ocasio-CortezOcasio-Cortez mourns Cummings: 'A devastating loss for our country' Booker endorses Lipinski challenger Lawmakers from both sides of the aisle mourn Cummings MORE (N.Y.), Ilhan OmarIlhan OmarKrystal Ball reacts to Ocasio-Cortez endorsing Sanders: 'Class power over girl power' The Hill's Morning Report - Tempers boil over at the White House Krystal Ball on Sanders debate performance: 'He absolutely hit it out of the park' MORE (Minn.), Rashida TlaibRashida Harbi TlaibOcasio-Cortez mourns Cummings: 'A devastating loss for our country' Elijah Cummings, Democratic chairman and powerful Trump critic, dies at 68 Krystal Ball on Sanders debate performance: 'He absolutely hit it out of the park' MORE (Mich.) and Ayanna PressleyAyanna PressleyOcasio-Cortez mourns Cummings: 'A devastating loss for our country' Lawmakers from both sides of the aisle mourn Cummings Omar endorses Sanders presidential bid MORE (Mass.). All four are U.S. citizens, and only Omar, who came to the U.S. as a refugee from Somalia, was born outside the U.S. 

Graham lashed out at Ocasio-Cortez during Monday’s episode of “Fox & Friends,” calling the congresswoman and her colleagues “a bunch of Communists."

“They hate Israel, they hate our own country, they’re calling the guards along our border (the Border Patrol agents) concentration camp guards," Graham said.

"They're anti-Semitic, they're anti-America ... we don’t need to know anything about them personally, talk about their policies," Graham continued. "I think they are American citizens who are duly elected that are running on an agenda that is disgusting, that the American people will reject."

Trump went on to share Graham's message on his own Twitter account, but left off a series of quotes in which the senator encouraged the president to focus on policy. 

"Aim higher," Graham said when asked if Trump's tweets went too far. "They are American citizens. They won an election. Take on their policies. The bottom line here is this is a diverse country."