The Rev. Ted Haggard, the former president of the National Association of Evangelicals and one of the nation’s most influential Christian leaders, admitted today that he had purchased the illegal drug methamphetamine from a gay escort in Denver, but denied that he ever had sex with the man.

Mr. Haggard resigned as president of the evangelical association and stepped aside as senior pastor of the New Life mega-church in Colorado Springs, Colo., on Thursday after Michael Forest Jones, a self-described former gay prostitute, accused him of having a sexual affair for three years and using the drug, commonly known as crystal meth, during those encounters.

Earlier, in an e-mail message sent to parishioners and obtained by local news media, Ross Parsley, the acting pastor of the New Life Church said, “It is important for you to know that he confessed to the overseers that some of the accusations against him are true.”

Speaking to the Denver television station KUSA outside his house in Colorado Springs today, Mr. Haggard said a Denver hotel referred him to Mr. Jones for the purpose of getting a massage. He said he met with Mr. Jones and bought the drug. “I was tempted, I bought it, but I did not use it,” he said today. The station posted the video interview on its Web site.