Evangelicalism
In the words of Albert Mohler, president of the Southern Baptist Theological Seminary, confessional evangelicalism refers to "that movement of Christian believers who seek a constant convictional continuity with the theological formulas of the Protestant Reformation". While approving of the evangelical distinctions proposed by Bebbington, confessional evangelicals believe that authentic evangelicalism requires more concrete definition in order to protect the movement from theological liberalism and from heresy. According to confessional evangelicals, subscription to the ecumenical creeds and to the Reformation-era confessions of faith (such as the confessions of the Reformed churches) provides such protection. Confessional evangelicals are represented by conservative Presbyterian churches (emphasizing the Westminster Confession), certain Baptist churches that emphasize historic Baptist confessions such as the Second London Confession, evangelical Anglicans who emphasize the Thirty-Nine Articles (such as in the Anglican Diocese of Sydney, Australia), and some confessional Lutherans with pietistic convictions.
Christianity in the United States
As shown in the table below, some denominations with similar names and historical ties to Evangelical groups are considered Mainline. 
Evangelicalism is a Protestant Christian movement. In typical usage, the term "mainline" is contrasted with "evangelical". Theologically conservative critics accuse the mainline churches of "the substitution of leftist social action for Christian evangelizing, and the disappearance of biblical theology," and maintain that "All the Mainline churches have become essentially the same church: their histories, their theologies, and even much of their practice lost to a uniform vision of social progress." Most adherents consider the key characteristics of evangelicalism to be: a belief in the need for personal conversion (or being "born again"); some expression of the gospel in effort; a high regard for Biblical authority; and an emphasis on the death and resurrection of Jesus. David Bebbington has termed these four distinctive aspects "conversionism," "activism", "biblicism", and "crucicentrism", saying, "Together they form a quadrilateral of priorities that is the basis of Evangelicalism."