Member of the PSC-CVP since its creation in 1945, Harmel was elected deputy for the first time in the parliamentary elections of 17 February 1946.
PSC-CVP'nin üyesi olan 1945'te kurulan Harmel, 17 Şubat 1946'da yapılan parlamento seçimlerinde ilk kez milletvekili seçildi.