For the past two decades, Barack Obama has been a faithful member of the congregation at Chicago's Trinity United Church of Christ. Trinity is no run-of-the-mill black church. It's social activism and political awareness on pure, natural holy water. Trinity's progressive pastor, the Rev. Jeremiah Wright, preaches the black theology of liberation. And he practices what he preaches. Back when apartheid was the law of the land in South Africa, when Nelson Mandela was a political prisoner and when American corporations, institutions and the U.S. government all gave their blessings to those evil doings, the dashiki-wearing minister planted a ''Free...