Harvard University law professor and consumer advocate Elizabeth Warren has officially entered the race for the Democratic nomination to challenge Massachusetts Republican Sen. Scott Brown. Warren most recently served in the Obama administration, where she helped launch the Consumer Financial Protection Bureau. In a video message posted online, Warren touted her background standing up to corporate interests.

Elizabeth Warren: “I grew up on the ragged edge of the middle class, and I know it’s hard out there. I fought all my life for working families, and I’ve stood up to some pretty powerful interests. Those interests are going to line up against this campaign, and that’s why I need you.”