The Obama administration has tapped a Democrat expert on shareholder activism and a Republican critic of recent regulation to fill two vacancies on the Securities and Exchange Commission. Lisa Fairfax is a George Washington University law professor known for her expertise in shareholder activism, corporate governance and corporate securities. Hester Peirce, a former aid to Senate Banking Chair Richard Shelby (R-Ala.), is a senior research fellow at the Mercatus Center, a free-market-oriented think tank at George Mason University. Both require Senate confirmation. Read original story from The Wall Street Journal.