  The question of CP violating phases in supersymmetry and electric dipole
moments (EDMs) is considered within the framework of supergravity grand
unification (GUT) models with a light ($\stackrel{<}{\sim}$1 TeV) mass
spectrum. In the minimal model, the nearness of the t-quark Landau pole
automatically suppresses the t-quark cubic soft breaking phase at the
electroweak scale. However, current EDM data require the quadratic soft
breaking phase to be small at the electroweak scale unless tan$\beta$ is small
(tan$\beta\stackrel{<}{\sim}$3), and the EDM data combined with the requirement
of electroweak symmetry breaking require this phase to be both large and highly
fine tuned at the GUT scale unless tan$\beta$ is small. Non minimal models are
also examined, and generally show the same behavior.

High Energy Physics - Phenomenology