Rep. Gary Condit's two children resigned from Gov. Gray Davis' office Tuesday, one day after the governor joined those criticizing their father in the case of missing intern Chandra Levy.

Chad, 33, and Cadee Condit, 26, submitted a sharply worded joint resignation letter saying the Condits "are a proud and loyal family, not only in the good times but also during the darkest hours ... Continued employment with the governor's office would undercut that standard."

Chad Condit worked as a Central Valley liaison for Davis and his sister was Davis' special assistant. Davis and the Democratic congressman from California have been longtime friends and political allies.

"I regret their decision to leave ... I wish them all the best in their future endeavors," Davis said in a statement.

The congressman's son criticized Davis on Monday night during an appearance on CNN's Larry King Live.

"There is no honor in kicking somebody when they are down," Condit's son said.

Davis spoke publicly about the case for the first time Monday, saying he was "disheartened that Congressman Condit did not speak out more quickly or more fully" in last week's interview with ABC's Connie Chung.

Davis said he did not see the interview, but had read a transcript and media reports about it.

In their resignation letter, the children wrote that Davis' statement "will not help find Chandra Levy," and accused him of speaking about the case for political gain.

"Friendship should not be based on poll numbers," the letter said.