I never really considered it a major part of Evangelicalism, we're a pretty conservative lot:
Is the Evangelical Left Fizzling? | The Weekly Standard: "Exit polls of actual voting by evangelicals indicate that the evangelical left remains primarily a phenomenon among evangelical elites on seminary and college campuses and among some parachurch and activist groups. The prolonged wars, culture clashes, and ultimate financial collapse during the George W. Bush years undoubtedly moved some evangelical elites and young people to the left. But the ongoing recession, explosion of government spending, and liberal stances on abortion and homosexuality by the Obama administration (the NAE quietly opposes revoking “Don’t Ask, Don’t Tell”), along with the president's discomfort with American exceptionalism, have likely solidified grassroots evangelicals overall within their traditional conservative politics. Like left-leaning mainline Protestant elites starting decades ago, evangelical elites increasingly will probably denounce their own constituency for its lack of political enlightenment."