Political party strength in Massachusetts

The following table indicates the party of elected officials in Massachusetts:
 * Governor
 * Lieutenant Governor
 * Secretary of the Commonwealth
 * Attorney General
 * Treasurer and Receiver-General
 * Auditor

The table also indicates the historical party composition in the:
 * Massachusetts Senate
 * Massachusetts House of Representatives
 * State delegation to the United States Senate
 * State delegation to the United States House of Representatives

For years in which a United States presidential election was held, the table indicates which party's nominees received the state's electoral votes, and whether they ✅ won the election or ❌ lost the election.

Each time an official is elected or re-elected, a new box for that official is included to indicate their repeated political party strength.