DENVER - Tom Tancredo has been called a one-trick pony of a politician, a man out of step with his party, a bigot. The Republican congressman vehemently opposes illegal immigration, and he created an uproar last week when he talked about nuking Muslim holy sites. No matter, Tancredo is pressing on and even hinting at a long-shot presidential bid in 2008. Tancredo has already visited New Hampshire and Iowa this year, and says he found a welcome audience among voters who are fed up with the nation's immigration policies, including proposals by President Bush. "Unless I misread the political tea...