Wall Street lobbyists concerned Sherrod Brown could become banking committee chairman

Sen. Tim Johnson, D-S.D., announced he will retire in 2014, which means the Senate Banking Committee will have to find a new chairman. Wall Street is hoping for just about anyone but Sen. Sherrod Brown, D-Ohio, who is fourth in line. Fourth on the list looks like a longshot at first glance, but the three senators ahead of Brown are likely to bypass the opportunity. Why are three senators likely to pass on the chairmanship and why does Wall Street fear a Brown regime?