  The measurement of the electric dipole moment (EDM) is an excellent test of
the standard model of particle physics, and the detection of a finite value is
signal of a new source of CP violation beyond it. Among systems for which the
EDM can be measured, light nuclei are particularly interesting due to their
high sensitivity to new physics. In this proceedings contribution, we examine
the sensitivity of the EDM of several light nuclei to the CP-odd one
pion-exchange nucleon-nucleon interaction within the cluster model. We suggest
an approximate sum rule for the nuclear EDM.
