Miller was born in Junction City, Kansas on January 29, 1886.

He entered politics following his service and was elected to the Wyoming House of Representatives.

He took his oath and was sworn in on December 27, 1932, 6-days early.

[1] Governor Miller was re-elected in 1935 and he replaced hanging with the gas chamber for executions.

After his gubernatorial career, Miller served on the War Production Board as well as the Wyoming State Senate.