Former Ohio Gov. John Kasich said his advice for fellow Republicans in Congress during the impeachment process was to "look in the mirror at how you want to be remembered."

Kasich, who was defeated by President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE in the 2016 primary and has often criticized the president, said Republicans shouldn't be afraid of telling Trump their true feelings.

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"Look in the mirror and figure out how you want to be remembered later and how you feel about yourself today," Kasich told CNN's Jake Tapper Jacob (Jake) Paul TapperThe media's misleading use of COVID-19 data Julia Louis-Dreyfus: 'We can't spend much time grieving' Ginsburg Pence aide dismisses concerns rushed vote on Trump nominee will hurt vulnerable senators MORE during an appearance on "State of the Union."

"There's nothing wrong with telling the truth and sharing your real feelings," he said.

John Kasich to Republicans: "Look in the mirror and figure out how you want to be remembered later and how do you feel about yourself today." https://t.co/xhB9NDZsNS pic.twitter.com/1BeRmQx4nY — The Hill (@thehill) October 13, 2019

Kasich said he believes Trump was "dead wrong" to press Ukraine's president to investigate former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE and his son, regardless of whether the president was withholding aid to that country to convince Ukraine leaders to begin the probe.

He did say that if a quid pro quo between the investigation and the aid is proven, GOP lawmakers may be less willing to defend the president.

Kasich said Democrats should hold a vote on launching an impeachment inquiry, a move the party's House leadership has said is not necessary.

"I don't understand why they won't do that," Kasich said.