Borginon was the last chairman of the Volksunie and Flemish Liberals and Democrats (VLD) floor leader from 2006 until the general election of 2007.

While at the UIA for his undergraduate studies, he was a member and later praeses of the Katholiek Vlaams Hoogstudentenverbond (KVHV) of Antwerp, a Flemish nationalist students association.

Bert Anciaux, one of the leading figures in Spirit, brought that new party into the orbit of the socialist SP.A.

This caused an exodus from Spirit where Patrik Vankrunkelsven, Vincent Van Quickenborne, Margriet Hermans and Borginon moved to the liberal VLD in May 2002.

At the start of 2006, he took over as VLD floor leader after incumbent Rik Daems was in a scandal involving a relationship with the socialist politician Sophie Pécriaux.