Embete | - Medlem av USAs representanthus (113. kongressperiode i USA, Massachusetts's 5th congressional district, 2013–2013)
- member of the Massachusetts House of Representatives (1973–1976)
- medlem av USAs representanthus (112. kongressperiode i USA, Massachusetts's 7th congressional district, 2011–2013)
- medlem av USAs representanthus (111. kongressperiode i USA, Massachusetts's 7th congressional district, 2009–2011)
- medlem av USAs representanthus (110. kongressperiode i USA, Massachusetts's 7th congressional district, 2007–2009)
- medlem av USAs representanthus (109th United States Congress, Massachusetts's 7th congressional district, 2005–2007)
- medlem av USAs representanthus (108th United States Congress, Massachusetts's 7th congressional district, 2003–2005)
- medlem av USAs representanthus (107th United States Congress, Massachusetts's 7th congressional district, 2001–2003)
- medlem av USAs representanthus (106th United States Congress, Massachusetts's 7th congressional district, 1999–2001)
- medlem av USAs representanthus (105th United States Congress, Massachusetts's 7th congressional district, 1997–1999)
- medlem av USAs representanthus (104th United States Congress, Massachusetts's 7th congressional district, 1995–1997)
- medlem av USAs representanthus (103rd United States Congress, Massachusetts's 7th congressional district, 1993–1995)
- medlem av USAs representanthus (102nd United States Congress, Massachusetts's 7th congressional district, 1991–1993)
- senator i USA (113. kongressperiode i USA, Massachusetts Class 2 senate seat, 2013–2015)
- senator i USA (114. kongressperiode i USA, Massachusetts Class 2 senate seat, 2015–2017)
- senator i USA (115. kongress i USA, Massachusetts Class 2 senate seat, 2017–2019)
- senator i USA (116th United States Congress, Massachusetts Class 2 senate seat, 2019–2021)
- medlem av USAs representanthus (95th United States Congress, Massachusetts's 7th congressional district, 1977–1979)
- medlem av USAs representanthus (96th United States Congress, Massachusetts's 7th congressional district, 1979–1981)
- medlem av USAs representanthus (98th United States Congress, Massachusetts's 7th congressional district, 1983–1985)
- medlem av USAs representanthus (99th United States Congress, Massachusetts's 7th congressional district, 1985–1987)
- medlem av USAs representanthus (100th United States Congress, Massachusetts's 7th congressional district, 1987–1989)
- medlem av USAs representanthus (101st United States Congress, Massachusetts's 7th congressional district, 1989–1991)
- medlem av USAs representanthus (94th United States Congress, Massachusetts's 7th congressional district, 1976–1977)
- senator i USA (Den 117. amerikanske kongress, Massachusetts Class 2 senate seat, 2021–2023)
- member of the Massachusetts House of Representatives (1975-1976 Massachusetts legislature)
- senator i USA (118th United States Congress, Massachusetts Class 2 senate seat, 2023–)
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