MERRIMACK, N.H. (AP) — New Mexico Gov. Bill Richardson ended his campaign for the presidency Wednesday after twin fourth-place finishes that showed his impressive credentials could not compete with his rivals' star power.

Richardson planned to announce the decision today, according to two people close to the governor with knowledge of the decision. They spoke on a condition of anonymity in advance of the governor's announcement.

Richardson's campaign would not comment on the governor's decision, reached after a meeting with his top advisers Wednesday in New Mexico.

Richardson had one of the most wide-ranging resumes of any candidate ever to run for the presidency, bringing experience from his time in Congress, President Clinton's Cabinet, in the New Mexico Statehouse as well as his unique role as a freelance diplomat. As a Hispanic, he added to the unprecedented diversity in the Democratic field that also included a black man and a woman.

But Hillary Rodham Clinton and Barack Obama dominated the spotlight in the campaign, and Richardson was never able to become a top-tier contender. He accused his rivals of failing to commit to bring troops home from Iraq soon enough.