I te tau 1954, i pootihia a Griffiths hei Democrat mai i te rohe 17 o te kaunihera o Michigan ki te 84th Congress, ana ka pootihia ano ki nga Kaunihera e iwa e whai ake nei, i mahi mai i te Hanuere 3, 1955 ki te Tihema 31, 1974 i te Whare US. I noho ia hei karere i te Democratic National Convention i te tau 1956 tae atu ki te tau 1968
He aha? Kaore ia i te kaitono mo te whiriwhiri ano ki te 94th Congress i te 1974.