CNN contributor and prominent Trump-basher Ana Navarro mocked Melania Trump on Monday, tweeting that the first lady has suffered “oxygen deprivation to the brain.”

The comment comes as Navarro apparently interrupted her own vacation to hurl insults at the nation’s first lady, as Breitbart noted.

Navarro was responding to the first lady’s comments at Monday’s summit on cyberbullying.

At that venue, Mrs. Trump talked with passion about the importance of responsible social media usage. “Let’s face it: Most children are more aware of the benefits and pitfalls of social media than some adults,” she said. “But we still need to do all we can to provide them with information and tools for successful and safe online habits.”

“On vacay & I swore I’d stay off political twitter,” Navarro tweeted in response. “But damn, girlfriend’s lack of self-awareness & any sense of shame for her husband’s use of the Presidency to bully others, is hard to ignore.”

Then Navarro added a comment about “oxygen deprivation.”

This is not the first time Navarro has made remarks of this kind.

The CNN commentator has claimed that President Donald Trump himself might be suffering from dementia, tweeting last August: “Only possible defensible explanation for Trump’s disgusting, unpresidential, narcissistic behavior, would be early-on-set dementia. Maybe.”

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Melania Trump’s spokeswoman, Stephanie Grisham, has already addressed critics of Melania Trump’s anti-cyberbullying campaign, as Breitbart pointed out, telling CNN’s Kate Bennett, “She’s addressed this before. She is well aware of the criticism, but that will not deter her from doing what she feels is right.”

Maybe Navarro is grumpy because she lost out on a panelist’s gig at ABC’s “The View”; she was rumored to be in the running as a replacement host.

“Fox and Friends Weekend” co-host Abby Huntsman was chosen for the slot.

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Joe Scarborough also slammed the first lady on Tuesday, saying, “Is she completely clueless, or trolling the man that she’s married to?”

See Navarro melt down over the president in the video below.