In this Dec. 12, 2007 file photo, Rep. Tom Tancredo, R-Colo., listens during the Des Moines Register Republican Presidential Debate in Johnston, Iowa. Four Republicans are competing Tuesday, Aug. 12, 2008 for the GOP nomination to succeed Tancredo, the five-term congressman whose forceful opposition to illegal immigration vaulted him to national prominence. (AP Photo/Charlie Neibergall, File)

Republican presidential hopeful, Rep. Tom Tancredo, R-Colo., announces that he will withdraw from the 2008 presidential race, and throw his support behind former Massachusetts Gov. Mitt Romney Thursday, Dec. 20, 2007, in Des Moines, Iowa. (AP Photo/M. Spencer Green)

Deb Miller, a campaign worker for Republican presidential hopeful, Rep. Tom Tancredo, R-Co., wipes a tear from her eye as he announces that he will withdraw from the 2008 presidential race and throw his support behind former Massachusetts Gov. Mitt Romney Thursday, Dec. 20, 2007 in Des Moines, Iowa. (AP Photo/M. Spencer Green)

Republican presidential hopeful, Rep. Tom Tancredo, R-Co., annouces that he will witdraw from the 2008 presidential race and throw his support behind former Massachusetts Gov. Mitt Romney Thursday, Dec. 20, 2007 in Des Moines, Iowa. (AP Photo/M. Spencer Green)

Republican Rep. Tom Tancredo, R-Colo. answers a question during the Republican presidential primary debatein Manchester, N.H., on Tuesday, June 5, 2007. 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. (AP Photo/Elise Amendola, FILE)

Republican presidential hopeful, Rep. Tom Tancredo, R-Colo., responds during the Des Moines Register Republican Presidential Debate in Johnston, Iowa, Wednesday, Dec. 12, 2007. (AP Photo/Charlie Neibergall)