  The search for CP violation in interactions of the Higgs boson with either
fermions or bosons provides attractive reference measurements in the Particle
Physics Community Planning Exercise (a.k.a. "Snowmass"). Benchmark measurements
of CP violation provide a limited and well-defined set of parameters that could
be tested at the proton, electron-positron, photon, and muon colliders, and
compared to those achieved through study of virtual effects in electric dipole
moment measurements. We review the current status of these CP-sensitive studies
and provide projections to future measurements.
