Several news outlets are reporting that Elizabeth Warren will officially announce on Wednesday her intention to run for the U.S. Senate in Massachusetts.

A Harvard Law professor and vocal critic of Wall Street abuses, Warren's role in setting up the Consumer Financial Protection Agency mandated by the Dodd-Frank financial overhaul bill made her a polarizing figure on Capitol Hill, alternately loathed and lauded. President Barack Obama declined to nominate her to lead the agency she had midwifed, bowing to Senate Republicans who had vowed to block her.

Since then, Warren has faced calls to take on incumbent senator Scott Brown (R-Mass.) from supporters who believe she would energize progressive voters. Warren, a Democrat, told The Associated Press she would declare her campaign on Wednesday morning. The Boston Globe,  citing a senior campaign adviser, reported the same.

The pressures on middle class families are worse than ever, but it is the big corporations that get their way in Washington, said Warren in a video to be posted on her campaign Web site, according to a partial script given to the Globe. I want to change that. I will work my heart out to earn the trust of the people of Massachusetts.