DENVER - Republican Rep. Tom Tancredo, whose forceful opposition to illegal immigration vaulted him to national prominence, plans to announce he is abandoning his long-shot bid for the presidency, a person close to Tancredo said Wednesday.

The five-term Colorado congressman planned to make the announcement at a news conference in Des Moines, Iowa, on Thursday, the person said, speaking on condition of anonymity because they were not authorized to speak for Tancredo or his campaign.

Tancredo's campaign would only say he planned a "major announcement" Thursday.

Tancredo has consistently polled at the back of the nine-person GOP field. He has based his campaign on opposition to illegal immigration, a top issue in many areas of the country. He has run television ads that link lax border security to terrorist attacks, rape and other crimes.

http://news.yahoo.com/s/ap/20071220/ap_po/tancredo