CRS – Speakers of the House: Elections, 1913-2015. Richard S. Beth – Specialist on Congress and the Legislative Process, Valerie Heitshusen, Specialist on Congress and the Legislative Process. November 3, 2015.

“Each new House elects a Speaker by roll call vote when it first convenes. Customarily, the conference of each major party nominates a candidate whose name is placed in nomination. A Member normally votes for the candidate of his or her own party conference but may vote for any individual, whether nominated or not. To be elected, a candidate must receive an absolute majority of all the votes cast for individuals. This number may be less than a majority (now 218) of the full membership of the House because of vacancies, absentees, or Members voting “present.” This report provides data on elections of the Speaker in each Congress since 1913, when the House first reached its present size of 435 Members. During that period (63rd through 114th Congresses), a Speaker was elected five times with the votes of less than a majority of the full membership. If a Speaker dies or resigns during a Congress, the House immediately elects a new one. Five such elections occurred since 1913. In the earlier two cases, the House elected the new Speaker by resolution; in the more recent three, the body used the same procedure as at the outset of a Congress..”