President Obama with Mary Jo White and Richard Cordray.

President Barack Obama nominated Mary Jo White to lead the Securities and Exchange Commission on Thursday, tapping an attorney with broad experience in prosecuting white-collar crimes to lead an agency that has a central role in implementing Wall Street reform

Noting her role in the convictions of mob boss John Gotti and terrorists who bombed the World Trade Center and two U.S. embassies in Africa, Obama said: "You don't want to mess with Mary Jo."