Dee ihe na-aga n'ihu maka paragraf a - Erickson bụ onye ọka iwu mpaghara Richland County site na 1936 ruo 1938 ma bụrụ onye ọka ikpe nke Ụlọikpe Kasị Elu nke Montana site na 1939 ruo 1945. Ọ bụ onye nnọchiteanya na Democratic National Conventions na 1948, 1952, na 1956
Ọ dị mma. Na 1944, ọ gbara ọsọ maka Gọvanọ nke Montana, merie Democratic isi ma na-aga n'ihu na ntuli aka izugbe, ebe ọ megidere Republican incumbent Gov. Sam C. Ford. Ford mechara merie Erickson site na oke mmeri iji merie oge nke abụọ ya dị ka gọvanọ. Erickson meriri Sen. Burton K. Wheeler n'ọchịchị Democratic n'afọ 1946, ọ bụ ezie na ọ meriri Wheeler na ọgba aghara, ọ tụfuru ntuli aka ndị Republican State Senator Zales Ecton. Ọ gbara ọsọ maka gọvanọ ọzọ na 1948, mana ọ bịara nke atọ na Democratic isi n'azụ onye bụbu Montana Attorney General John W. Bonner na Arthur Lamey. Site na 1956 ruo 1958 ọ bụ onye isi oche nke Montana Democratic Party na site na 1962 ruo 1973 ọ bụ onye otu Kọmitii Democratic Democratic.