"Trump's engaging in campaign activity during this trip is on Trump and Trump alone. Disgusting," Walter Shaub wrote.
"It kind of made us strong in weathering a very tumultuous storm at the time," Shaub said of the meditation sessions to deal with Trump.
Department of the Interior just the latest in Trump's administration to face such criticism.
The group demanded the investigation include whether Trump is coordinating directly with third-party celebrity-style publications to boost her brand's sales.
Staff should beware of laws against using the government to help and hurt media companies, experts say.
"The core principle of the ethics program is that you're not supposed to misuse your government position for private gain," Walter Shaub said.
Twitter users attacked Ivanka Trump in light of her father defending Confederate statues.
Trump has frequently been accused of being an autocrat, or absolute ruler who operates outside of the democratic system.
Walter Shaub, former director of the federal ethics office, calls for people to take to the streets if Trump fires Mueller.
Walter Shaub tweets that the "tone from the top matters."