Reposting a portion from Bloomberg..
President Barack Obama will nominate Janet Yellen as chairman of the Federal Reserve, which would put the world’s most powerful central bank in the hands of a key architect of its unprecedented stimulus program and the first female leader in its 100-year history.
Obama turned to Yellen, vice chairman of the Fed since 2010, after the other leading candidate, former Treasury secretary and White House economic adviser Lawrence Summers, withdrew from consideration amid mounting opposition from Democrats on the Senate Banking Committee.
http://www.bloomberg.com/news/2013-10-08/yellen-to-be-named-fed-chairman-as-obama-taps-first-female-chief.html#!