Complex sentence: Despite McCain's claims of the ad being a joke, Eleison Group blew the whistle on this cleverly-crafted ad targeted at evangelical Christians, preying on their fear of the coming Anti-Christ and' end of times'.
Split into simpler sentences: Despite McCain's claims of the ad being a joke, Eleison Group noticed strategy when they saw it. They recognized the ad as cleverly-crafted and targeted at evangelical Christians, preying on their fear of the coming Anti-Christ and' end of times'.