One of former National Security Adviser John Bolton's ex-aides is accusing him of caring more about book sales than his country.

Mark Groombridge worked for Bolton during his tenure as the U.S. ambassador to the United Nations under former President George W. Bush. On Monday, Groombridge tweeted that he has been deeply disappointed in Bolton's actions throughout President Trump's impeachment, writing, "You've let down your country. I worked loyally for you for 15 years. Yes, the Senate was never going to convict, but you had the opportunity to provide them with the info so they could make a fully informed decision. Guess it was about book sales after all."

The New York Times reported last month that in his forthcoming book, Bolton contradicts Trump's claims that there was no quid pro quo with Ukraine. Bolton did not testify during the House impeachment inquiry, following White House instructions not to cooperate with investigators. Democrats wanted Bolton to testify during Trump's Senate impeachment trial, but Republicans had enough votes to block their efforts. Of course, they would not have been able to stop Bolton from telling his full story to the press. Catherine Garcia