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Meghan McCain 'exhausted' by attacks on father

Meghan McCain said she is "exhausted" by the attacks launched against her father, Sen. John McCainJohn Sidney McCainMcConnell: GOP could try to repeal ObamaCare again after midterms Comey donates maximum amount to Democratic challenger in Virginia House race Live coverage: McSally clashes with Sinema in Arizona Senate debate MORE (R-Ariz.)

"I'm exhausted with the infighting within the Republican Party. I'm exhausted with the attacks on my father," Meghan McCain said on ABC News.

"I don't know if you guys have heard, but my father is fighting glioblastoma right now."

Meghan McCain said there's no threat that could be more painful than what her family is going through now and has been going through over the past several months.

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"I'm telling you, we're a tough ride-or-die family, and right now, there's really nothing that could possibly happen that could possibly be more complicated," she said.

"And I just have high hopes that someday, President Trump and the rest of the Republican Party can find some common ground together where if you have any kind of difference of opinion on the future of the country or the party, that you're not just automatically going to be threatened in return."

Her comments come after John McCain during a speech Monday blasted "half-baked, spurious nationalism" in the United States.

Trump was asked about the senator's comments Tuesday, and warned that at some point, he would fight back and it wouldn't "be pretty."

The Arizona Republican dismissed Trump's threat, saying: "I've faced far greater challenges than this."

John McCain, who was diagnosed with brain cancer in July, served in the Navy for more than two decades and spent years as a prisoner of war in Vietnam.

Trump has attacked John McCain in the past after he voted against a GOP bill to repeal and replace ObamaCare.