[1] He entered private practice in Saint Paul from 1907 to 1916,[1] a portion of that time with the firm owned by future United States Supreme Court Justice Pierce Butler and future United States Attorney General William D.

[1] On August 12, 1918, with the outbreak of world War I, he resigned as insurance commissioner and joined the United States Army, where he initially became a private.

[1][3] He was stationed at Fort Pike, Arkansas at the Infantry Central Officers Training School.

[1] Sanborn was nominated by President Herbert Hoover on December 19, 1931, to a seat on the United States Court of Appeals for the Eighth Circuit vacated by Judge Wilbur F.

[1] Sanborn also played an active role in the merger that officially created William Mitchell College of Law.