The attorney said he and Nguyen met with investigators for two hours Thursday. He described the meeting as “pleasant and professional” but declined to elaborate.160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! AD Quality Auto 360p 720p 1080p Top articles1/5READ MORESurfer attacked by shark near Channel Islands calls rescue a ‘Christmas miracle’State and federal officials are investigating the mailing for possible violations of election law. Baugh said that after speaking with the state Attorney General’s Office and the private company that distributed the mailer, he believes Nguyen had direct knowledge of the letter. “I learned information that allows me to draw the conclusion that not only was Mr. Nguyen’s campaign involved in this, but that Mr. Nguyen was personally involved in expediting the mailer,” Baugh said in a telephone interview. He called the letter “obnoxious and reprehensible.” Nguyen was not immediately available to react to the committee’s vote, but his attorney, David Wiechert, said Thursday night that his client does not plan to quit. “Mr. Nguyen has no intention of dropping out of the race. He would do the public a disservice if he dropped out,” Wiechert said. GARDEN GROVE – Orange County Republican leaders on Thursday called for the withdrawal of a GOP congressional candidate who has acknowledged that his campaign sent a letter threatening Hispanic immigrant voters. County Republican Chairman Scott Baugh told The Associated Press that the party’s executive committee voted unanimously to ask candidate Tan D. Nguyen to pull out. Nguyen’s attorney said Thursday night his client has no intention of quitting. Earlier Thursday, Nguyen told The Associated Press he has fired a campaign staffer who may have been the source of the letter that falsely told Hispanics immigrants they can go to jail if they try to vote. “I did not do this. I did not approve of any letter,” said Nguyen, the challenger to Democratic U.S. Rep. Loretta Sanchez. Nguyen is a Vietnamese immigrant whose opposition to illegal immigration figures heavily in his underdog campaign.