House Speaker John BoehnerJohn Andrew BoehnerRestoring fiscal sanity requires bipartisan courage GOP congressman slams primary rival for Ryan donations Speculation swirls about Kevin McCarthy’s future MORE (R-Ohio) on Thursday swore in the newest member of the House, Rep. Katherine Clark (D-Mass.), who won former Rep. Ed MarkeyEdward (Ed) John MarkeyRegulators seek to remove barriers to electric grid storage Markey, Paul want to know if new rules are helping opioid treatment Oil spill tax on oil companies reinstated as part of budget deal MORE's seat this week.

Clark was joined by her Democratic Massachusetts colleagues on the House floor, and said after her quick swearing-in that she hopes both sides can work together on the difficult issues ahead.

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Clark also acknowledged Sen. Markey, who joined members of the House for her swearing in.

"Senator Markey, you set a standard of excellence during your time in the House," she said. "I look forward to carrying on your work for the people of our district, and partnering with you and the entire Massachusetts delegation to move Massachusetts and our delegation forward." BoehnerJohn Andrew BoehnerRestoring fiscal sanity requires bipartisan courage GOP congressman slams primary rival for Ryan donations Speculation swirls about Kevin McCarthy’s future MORE-swears-in-clark" target="_blank">[WATCH VIDEO]

Clark's swearing in puts the House at 433 members, with two vacancies.