White House counselor Kellyanne Conway Kellyanne Elizabeth ConwaySpecial counsel investigating DeVos for potential Hatch Act violation: report George and Kellyanne Conway honor Ginsburg Trump carries on with rally, unaware of Ginsburg's death MORE's husband, George Conway, took aim at the president on Twitter Friday over 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's criticism of his predecessor, former President Obama.

In a tweet, George Conway, a conservative lawyer, criticized Trump for mocking Obama for a 2008 gaffe in which he mistakenly said he visited "57 states" during his first presidential run.

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"When President Obama said that he has been to '57 States,' very little mention in Fake News Media. Can you imagine if I said that...story of the year!" Trump had written in his tweet.

Conway responded on Twitter, saying that there is a "huge difference" between Obama's mistake and Trump's "witless prevarication on virtually all topics, large and small."

"Needless to say, there’s a huge difference between an isolated slip of the tongue and ceaseless, shameless, and witless prevarication on virtually all topics, large and small," Conway responded.

Needless to say, there’s a huge difference between an isolated slip of the tongue and ceaseless, shameless, and witless prevarication on virtually all topics, large and small. https://t.co/mvV8cgZLyp — George Conway (@gtconway3d) September 14, 2018

Trump's tweet followed the former president's recent return to the campaign trail to support some Democratic candidates ahead of November's midterm elections.

Earlier this month, Obama stumped for several California Democrats, issuing several veiled shots at Trump during his remarks.

“It’s always tempting for politicians for their own gain and for people in power to try to see if they can divide people, scapegoat folks, turn them on each other, because when that happens you get gridlock and government doesn’t work and people get cynical and decide to not participate," he said at a rally earlier in September.

Conway has frequently criticized Trump on social media, despite his wife's position at the White House.

Earlier this month, Conway retweeted a controversial anonymous New York Times op-ed warning that Trump is a dangerous and amoral leader.

Both Conways were the subjects of an interview in The Washington Post last month in which Kellyanne Conway stated that "part" of her husband "thinks I chose Donald Trump over him."

In the same interview, Kellyanne Conway called her husband's criticism of the president "disrespectful" to her.

“I think it’s disrespectful,” she said. “I think it disrespects his wife.”

"If there’s an issue, it’s because she’s in that job, for that man," George Conway told the Post in the article. "If my wife were the counselor to the CEO of Pepsi and I had a problem with her boss, I would simply drink my Coke and keep my mouth shut. If the president were simply mediocre or even bad, I’d have nothing to say. This is much different.”