Sen. John McCain John Sidney McCainKelly's lead widens to 10 points in Arizona Senate race: poll COVID response shows a way forward on private gun sale checks Trump pulls into must-win Arizona trailing in polls MORE (R-Ariz.) told Fox News’s Martha MacCallum that he’s leaning toward voting to confirm Rex Tillerson, President-elect Donald Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE’s nominee to head the State Department.

"Some of my concerns have been satisfied. I haven't made up my mind completely," McCain said.

He’s previously voiced concerns about Trump’s selection of the former Exxon Mobil Corp. CEO and has been critical of Tillerson’s ties to Russia and his relationship with Russian President Vladimir Putin.

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When pressed Monday evening on whether he’ll support Tillerson going forward, McCain said, "Barely, yes."

"I think [Tillerson] is a good man,” he said. “"I just want him to have an understanding of the moral dimensions of Vladimir Putin in particular, and the slaughter that he has inflicted.”