Complex sentence: Many participants in the Christian Right in the United States, however, are classified by critics as a "soft" form of Dominionism involving both postmillennialists and premillennialists and others in a coalition seeking political power.
Split into simpler sentences: Many participants in the Christian Right in the United States, however, are classified by critics as practicing a "soft" form of Dominionism. This includes both postmillennialists and premillennialists and others in a coalition seeking political power.