Washington (CNN) Conservative lawyer George Conway, the husband of White House counselor Kellyanne Conway, said Wednesday he's "horrified" and "appalled" with the Republican Party's defense of President Donald Trump in the impeachment inquiry.

"He was using the power of the presidency -- in its most unchecked area, foreign affairs -- to advance his own personal interests as opposed to the country's," Conway said of Trump on MSNBC.

Conway has been an outspoken critic of Trump on Twitter , in op-eds , and in a recent recording of a podcast , but Wednesday, ahead of the House impeachment inquiry's first public hearing, was his first television appearance since he began criticizing the President.

Democrats have been investigating whether Trump abused his office by pressuring the Ukrainian President to announce an investigation that would benefit Trump politically, while withholding a one-on-one meeting and nearly $400 million in security aid.

"This is about the country, people doing the right thing by the country and not by their party. And this is about telling the truth about what really happened and not about party loyalty," Conway said on MSNBC. "This is about putting the country, the law, truth above partisanship."

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