The Exorcism at 1600 Penn #4

President Kelly Doyle has seen the devil. If she's to save her daughter, Mara, from possession by the demon calling itself "The Purifier" she needs to secure an exorcist from the Vatican as soon as possible. Meanwhile, a nuclear threat looms, and Doyle's advisors pressure her to strike. Every shadow is razor-sharp, articles of impeachment have been drafted... and the cleansing fire hungers.