Kammala jumla mai zuwa: Daga 1981 zuwa 1988 shi ne Shugaban Kwamitin Demokradiyya a Amurka ta Tsakiya (PRODEMCA), wanda ya soki 'yan Marxist-Leninists a Amurka ta Tsakiya, musamman Sandinistas a Nicaragua da FMLN a Amurka ta Tsakiya; An kuma kira PRODEMCA a matsayin "Abokai na Cibiyar Demokradiyya a Amurka ta Tsakiya". Baya ga sukar 'yan juyin juya hali, Kemble ya matsa wa Majalisa don tallafawa Shugaban Kirista na El Salvador José Napoleón Duarte, a lokacin juyin juya hali.
Salvadoran yakin basasa; ya kuma yi jayayya cewa Majalisa ya kamata ta ba da kuɗin Nicaragua Contras, sannan ta shiga cikin yakin basasa a kan Sandinistas, don matsa lamba ga Sandinistas don yin shawarwari game da yarjejeniyar zaman lafiya tare da ƙarin tabbacin ga 'yan adawa na jama'a. A cikin goyon bayansa ga kudade na Majalisa na Contras, Kemble na ɗaya daga cikin "Gang of Four" na fitattun 'yan gurguzu ko masu adawa da Yaƙin Vietnam; na biyu shi ne tsohon abokin gaba a lokacin Yaƙin Vietnam, Bruce Cameron, sauran kuma Robert S. Leiken da Bernard W. Aronson. Gang of Four ya bambanta da Gwamnatin Reagan a wasu tambayoyi. Misali, sun goyi bayan kokarin da aka yi na canja wurin ikon tallafawa Contra daga CIA da Ma'aikatar Tsaro zuwa USAID na Ma'aikatar Harkokin Wajen; sun kuma goyi bayan tattaunawar da gwamnatin Reagan ta yi adawa da "masu tsauraran ra'ayi" wadanda ke son kayar da Sandinistas, a cewar Cameron. Harkokin siyasar Kemble na Amurka ta Tsakiya a shekarun 1980 ba su da mashahuri a tsakanin 'yan sassaucin ra'ayi da' yan gurguzu na dimokiradiyya a Jam'iyyar Democrat.