The Texas megachurch pastor whose past comments about the Catholic Church have caused headaches for John McCain for over two months will issue an apology to Catholics later today, according a top Christian conservative. John Hagee, pastor of San Antonio's Cornerstone Church, will send a letter to Catholic League President William Donahue expressing "deep regret for any comments that Catholics have found hurtful." "After engaging in constructive dialouge with Catholic friends and leaders, I now have an improved understanding of the Catholic Church, its relation to the Jewish faith, and the history of anti-Catholicism," Hagee wrote in a letter running...