The Caucus is chaired by Congressman Griffith, whose family originate in North West Wales, and has already attracted more than a dozen members.
Caiff y Cawcws ei gadeirio gan y Cyngreswr Griffith, sydd â’i deulu’n hanu o Ogledd-orllewin Cymru, ac mae eisoes wedi denu mwy na dwsin o aelodau.