Ohio Gov. John Kasich (R) is saying that more members of the Republican Party need to be willing to stand up to President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE.

“It’s been pretty lonely out here," Kasich told The Guardian in an interview published on Friday, alluding to how he is one of the few members of the GOP to consistently criticize the president.

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“Not that I mind walking a lonely road, I’ve done it most of my career, but always would be good if you had more people who are willing to stand up and say that’s the wrong direction,” Kasich added.

Kasich, who ran for the Republican nomination for president in 2016, goes on to voice how he became a vocal opponent of Trump's because of "political principle."

“I’m not a Johnny-come-lately to this," Kasich said, adding that “most of the people have been upset with [Trump], and then endorse him and then they get upset with him. I just have not operated that way."

“I did not feel public pressure to have to go and support somebody that I was not convinced was going to pull the country together," he said.

Kasich's comments come after a week in which Trump has faced scrutiny from Republican and Democratic lawmakers for his actions in a summit with Russian President Vladimir Putin. Among other things, Trump refused to denounce Russia for interfering in the 2016 presidential election.

Trump and the White House have attempted to walk back the comments, with Trump claiming he misspoke and later saying in an interview with CBS this week that he holds Putin responsible for election interference.

“To me it doesn’t explain away what happened,” Kasich said in response to Trump's walk-back. “That was just some short little thing, I just don’t know, I mean maybe he does not understand the consequence or totally disagrees with the vitalness of NATO or the EU.”

Kasich has frequently criticized Trump throughout his presidency and has not ruled out a bid for president in 2020.

"I don't know what I'm going to do," Kasich told CNN's "State of the Union" when asked about his political ambitions in March.