Democratic Sen. Warren vows not to run for president in 2016 FILE: Tuesday Nov. 12, 2013: Senate Banking Committee member Sen. Elizabeth Warren, D- Mass. listens to testimony on Capitol Hill, in Washington, D.C.AP Massachusetts Sen. Elizabeth Warren pledged Wednesday that she will not seek the 2016 Democratic nomination for president, presumably squashing speculation about her challenging front-runner Hillary Clinton. "I'm not running for president and I plan to serve out my term," the first-term senator said at a Boston press conference, according to The Boston Herald. The announcement follows weeks of speculation about a possible Warren run in light of the political winds that recently swept fellow populist-styled Democrat Bill de Blasio into the New York City mayor's office. Whether Warren's statement will definitively end speculation remains to be seen, since her spokeswoman noted as recently as last month that Warren had previously said she would not enter the race. "I pledge to serve out my term," Warren, a consumer advocate, said Wednesday. I am not running for president. I am working as hard as I can to be the best possible senator I can be.