skip to main content

Sen. Michael “Mike” Mansfield

Former Senator for Montana

Mansfield was a senator from Montana and was a Democrat. He served from 1953 to 1976.

He was previously the representative for Montana’s 1st congressional district as a Democrat from 1943 to 1952.

Photo of Sen. Michael “Mike” Mansfield [D-MT, 1953-1976]


Ideology–Leadership Chart

Mansfield is shown as a purple triangle in our ideology-leadership chart below. Each dot was a member of the Senate in 1976 positioned according to our liberal–conservative ideology score (left to right) and our leadership score (leaders are toward the top).

The chart is based on the bills Mansfield sponsored and cosponsored. See full analysis methodology.

Enacted Legislation

Mansfield was the primary sponsor of 12 bills that were enacted. The most recent include:

View All »

We consider a bill enacted if one of the following is true: a) it is enacted itself, b) it has a companion bill in the other chamber (as identified by Congress) which was enacted, or c) if at least about half of its provisions were incorporated into bills that were enacted (as determined by an automated text analysis, applicable beginning with bills in the 110th Congress).

Bills Sponsored

Issue Areas

Mansfield sponsored bills primarily in these issue areas:

Private Legislation (43%) Government Operations and Politics (22%) International Affairs (12%) Crime and Law Enforcement (6%)

Recent Bills

Some of Mansfield’s most recently sponsored bills include...

View All » | View Cosponsors »

Voting Record

Missed Votes

From Jan 1953 to Oct 1976, Mansfield missed 1,155 of 7,342 roll call votes, which is 15.7%. This is worse than the median of 13.0% among the lifetime records of senators serving in Oct 1976. The chart below reports missed votes over time.

Show the numbers...

Primary Sources

The information on this page is originally sourced from a variety of materials, including: