Sixteen appointees and advisers helping president-elect Barack Obama's Justice Department transition efforts all recently sat on the board of an organization little known outside legal circles: The American Constitution Society for Law and Policy. The liberal legal network, which blossomed during eight years of Democratic exile, counts as its veterans Obama’s choice for attorney general, Eric Holder: Vice President-elect Joe Biden's chief of staff, Ron Klain; and future White House Staff Secretary Lisa Brown. Seven other recent board members are advising the incoming administration on legal, education, and labor-related issues. Theresa Wynn Roseborough is rumored to be a top candidate...