Haggard, a married father of five, denied the allegations in an interview with KUSA-TV late Wednesday: "Never had a gay relationship with anybody, and I'm steady with my wife, I'm faithful to my wife."

The allegations came as voters in Colorado and seven other states prepare to decide ban-gay-marriage amendments next Tuesday. Besides the proposed ban on the Colorado ballot, a separate measure would establish the legality of domestic partnerships providing same-sex couples with many of the rights of married couples.

Mike Jones, 49, of Denver told the AP he decided to go public with his allegations because of the political fight.

"I just want people to step back and take a look and say, 'Look, we're all sinners, we all have faults, but if two people want to get married, just let them, and let them have a happy life,"' said Jones, who added that he isn't actively working for any political group.

Jones, who said he is gay, said he was also upset when he discovered Haggard and the New Life Church had publicly opposed same-sex marriage.

"It made me angry that here's someone preaching about gay marriage and going behind the scenes having gay sex," Jones said.

Jones, whose allegations were first aired on KHOW-AM radio in Denver, claimed Haggard paid him to have sex nearly every month over three years. He said he advertised himself as an escort on the Internet and was contacted by a man who called himself Art.

Jones said he later saw the man on television identified as Haggard. He said he last had sex with Haggard in August and did not warn him before making his allegations public this week.

Jones said he has voice mails from Haggard as well as an envelope he said Haggard used to mail him cash. He declined to make any of it available to the AP.

"There's some stuff on there (the voice mails) that's pretty damning," he said.

Haggard, a 1978 graduate of Oral Roberts University, was appointed president of the association in March 2003 and has been called one of the most influential evangelical Christians in the nation. He has participated in conservative Christian leaders' conference calls with White House staffers and lobbied members of Congress last year on U.S. Supreme Court appointees after Sandra Day O'Connor announced her retirement.

Richard Cizik, vice president for government affairs for the evangelicals' association, expressed shock.

"Is this something I can imagine of Ted Haggard? No," he said.

Carolyn Haggard, spokeswoman for the New Life Church and the pastor's niece, said a four-member church panel will investigate the allegations.

The board is comprised of the Rev. Larry Stockstill in Baker, La., the Rev. Mark Cowart of Colorado Springs, the Rev. Tim Ralph of Larkspur and the Rev. Michael Ware of Westminster. The board has the authority of to discipline Haggard, including removing him from ministry work.