Holman was a one term Senator from Oregon who was originally a staunch Republican isolationist who later soften his views against WWII. He was one of the many names who were mentioned to run against FDR. However those isolationist finally settled their support for Robert Taft which effectively ended Holman's aspirations.
After his defeat to Wayne Morse in 1944, he returned to private life and never sought office again. Holman managed Portland Box and Paper Co. He died in Portland-1959.