Rep. Adam Kinzinger (R-Ill.) said Wednesday he doesn't think he can support Republican presidential nominee Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE.

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"I've said my intention is to get there. I want to get there. I'm not there yet. I don't see how I get there anymore," Kinzinger, a veteran of the Iraq War, said Wednesday on CNN.

Kinzinger said he went to the Republican National Convention last month and was that hoping by the end of the week, he'd be able to "mildly" endorse Trump.

"You know, party unity and all that. Woke up Wednesday morning, saw his comments about Article 5, NATO, decided to hold off," he said.

"Then this spat, this unbelievable spat with the family of a fallen soldier, a fallen soldier who swore to protect and defend the Constitution of the United States, wouldn't even initially say we honor the family for their service. Immediately took it as what it was to him, an affront to him."

The Illinois congressman was referencing Trump's public feud with the family of Capt. Humayun Khan, who was killed in 2004 in Iraq.

Kinzinger continued to list comments Trump has made in the past, noting the nominee is "beginning to cross a lot of red lines in the unforgivable on politics."

"I'm not going to support Hillary [Clinton], but in America, we have the right to write somebody in, or skip the vote, and vote for Mark Kirk Mark Steven KirkLiberal veterans group urges Biden to name Duckworth VP On the Trail: Senate GOP hopefuls tie themselves to Trump Biden campaign releases video to explain 'what really happened in Ukraine' MORE [for Senate] in Illinois, for instance," he said.

"That's what it's looking like for me today. I just don't see how I get to Donald Trump anymore."

Kinzinger said although he doesn't agree with Democratic nominee Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE on "probably almost all things," he doesn't even know where Trump stands on foreign policy.

"For instance, even yesterday doubling down on saying how great it would be to have a fantastic relationship with [Russian President Vladimir] Putin," he said.

"Our party, you know, me and other people in the party have said for the last six months how awful it was that Hillary Clinton did this reset with the Russians, and how we were taken advantage of. Now, you have Vladimir Putin basically pulling out the old KGB playbook on how to manipulate Donald Trump, and it appears he's fallen right into it."

He said is an American before he is a Republican.

"For me personally — and I'm not trying to say to other people that you can't support Donald Trump — I'm saying for me personally, how can I support that?" he said.

"Because he has crossed so many red lines that a commander in chief, or a candidate for commander in chief should never cross. It's a tough position for me to be in."