Wilson's victory was partly due to the division of the opposition Republican Party into conservative and progressive factions.

A message of unity was portrayed by the Democrats, allowing this group to present themselves as above the bickering and corruption that had become associated with the Republican internal feud.

The Apportionment Act of 1911 also guaranteed that Arizona and New Mexico would have one seat each after those states joined the union in early 1912.

In reapportionment following the 1910 census,[citation needed] 41 new seats were added, bringing the House to its modern size.

This would be the last time the size of the House changed, except for a temporary addition of two seats in 1959 after the admission of Alaska and Hawaii and subsequent return to 435 in 1963.