Warren sworn in as first Mass. woman in US Senate

WASHINGTON (WHDH) -- Elizabeth Warren was sworn in as the state's newest U.S. Senator, the first woman from Massachusetts to hold the office.

The Democratic lawmaker was among a new crop of U.S. senators and those just reelected who took the oath of office during a ceremony Thursday in the Senate chambers in Washington, D.C. Vice President Joe Biden administered the oath.

Warren, who had Sen. John Kerry standing behind her, traded the title of professor for senator.

“I get goose bumps every time I come into this building,” Warren told 7News on Thursday. “I can’t believe I’m going to become the senator for the people of the Commonwealth of Massachusetts…Pretty amazing.”

Later in the Kennedy Caucus Room, Warren greeted supporters. Then her husband watched as she took the oath of office again in the Old Senate Chamber, the mock ceremony was more intimate.

Warren said she is honored to be the first woman representing the Commonwealth of Massachusetts in the U.S. Senate. She said she is mindful that Sen. Kerry may soon leave to become Secretary of State if confirmed as expected.

“So much for being the understudy,” said Warren.

When asked if the state will be hurt with two rookie senators, Warren said “I think that, I can at least promise this -- I’ll be working my tail off.”

7News took a look inside Rep. Scott Brown’s office -- it was cleared out. He could run again, though, for Kerry’s seat. When asked if Warren could work with Brown if he is elected again, she said “I’ll work with anybody who’s out there working on behalf of America’s families.”

Warren said she has not yet been assigned an office -- her staff been working out of the basement.

 Before being sworn in, Warren sent an email to supporters thanking them for their help in last year's election. She is planning to hold a reception and re-enactment of her swearing in ceremony on Saturday at Roxbury Community College in Boston.

The Associated Press contributed to this report.