George Conway, White House counselor Kellyanne Conway's husband, indicated Sunday he thinks President Trump's mental state is deteriorating.

Following the president's morning flurry of tweets in which he floated the idea of a federal investigation into "Saturday Night Live" and attacked the late Sen. John McCain, Conway tweeted: "His condition is getting worse."

His condition is getting worse. — George Conway (@gtconway3d) March 17, 2019

Conway, a conservative lawyer who frequently criticizes Trump, didn't mention the president by name, but he spent the day tweeting and retweeting about him.

At one point he retweeted a tweet from Trump in May 2016 in which said Sen. Ted Cruz, R-Texas, then a rival for the GOP presidential nomination, "went wacko."

Conway snarked, "as they say, a tweet for everything."

as they say, a tweet for everything https://t.co/mhock6u78l — George Conway (@gtconway3d) March 17, 2019

Conway also retweeted conservative commentator and "Never Trump" leader Bill Kristol, who questioned Trump's mental fitness.

"Fellow Republicans, read today's tweets and retweets. Don't avert your eyes. Averting your eyes is refusing to come to grips with Trump's mental condition and psychological state. It's avoiding reality," Kristol said in the afternoon after Trump retweeted a number of posts, including from Jack Posobiec, a far-right media personality known for advancing conspiracy theories such as “Pizzagate.”

Re-upping this in light of Trump's retweets in the last hour. And I repeat: Fellow Republicans, read today's tweets and retweets. Don't avert your eyes. Averting your eyes is refusing to come to grips with Trump's mental condition and psychological state. It's avoiding reality. https://t.co/PCNzhCD0ql — Bill "Slightly Dangerous" Kristol (@BillKristol) March 17, 2019

Earlier in the day, reacting to Trump's morning tweets, Kristol said: "To Republicans who've been inclined to acquiesce in a Trump re-nomination in 2020: Read his tweets this morning. Think seriously about his mental condition and psychological state. Then tell me you're fine with him as president of the United States for an additional four years."

Days ago, Conway was more direct in his speculation that Trump's mind is in decline.

"#SummaCumLiar," Conway said in a Twitter tirade Wednesday in reaction to Trump falsely claiming that a federal judge who presided over one of former Trump campaign manager Paul Manafort's cases exonerated him of collusion with Russia.

In a separate tweet, Conway also condemned Trump for the mundane slip of calling Apple CEO Tim Cook "Tim Apple." "Have we ever seen this degree of brazen, pathological mendacity in American public life? One day he makes a harmless slip of the tongue, something any mentally balanced person would laugh off," he said.

Have we ever seen this degree of brazen, pathological mendacity in American public life? One day he makes a harmless slip of the tongue, something any mentally balanced person would laugh off. — George Conway (@gtconway3d) March 14, 2019

"Whether or not impeachment is in order, a serious inquiry needs to be made about this man’s condition of mind," he said in another tweet.

Despite Conway's and Kristol's doubts about Trump's mental state, Trump, 72, received good health news after his annual physical in February. “While the reports and recommendations are still being finalized, I am happy to announce the President of the United States is in very good health and I anticipate he will remain so for the duration of his Presidency, and beyond,” a statement from White House doctor Sean Conley said.

George Conway's harsh criticism of Trump stand in stark contrast to the statements of his wife, Kellyanne Conway, who is one of the president's most vociferous defenders.

Just last week, Kellyanne said the alleged New Zealand mosque shooter was wrong to call Trump "a symbol of renewed white identity" and said the alleged shooter was instead an "eco-terrorist."

Conway hasn't taken kindly to questions about her husband's tweets. When asked just that by CNN's Dana Bash last year, she shot back, “It’s fascinating to me that CNN would go there, but it’s very good for the whole world to have just witnessed that it’s now fair game how people’s spouses and significant others may differ with them."