True, but it didn't go out in his name but on a made up letterhead similar to an anti-illegal immigrant group's. The database was from Tan's campaign but he claims his office manager made it available to that third party who did the actual mailing and perhaps created the letter itself.
No idea why he's invite the staffer, initially fired, back to his campaign.
On KFI he ADMITS knowing who wrote the letter but declined to name the person claiming he'd wait for the investigation.