  Given the increasingly more stringent bounds on Supersymmetry (SUSY) from the
LHC searches, we are motivated to explore the situation in which the only
accessible SUSY states are the electroweakinos (charginos and neutralinos). In
the minimal SUSY framework, we systematically study the three general scenarios
classified by the relative size of the gaugino mass parameters M_1, M_2 and the
Higgsino mass parameter \mu, with six distinctive cases, four of which would
naturally result in a compressed spectrum of nearly degenerate LSPs. We present
the relevant decay branching fractions and provide insightful understanding
about the decay modes in connection with the Goldstone-boson Equivalence
Theorem. We show the cross sections for electroweakino pair production at the
LHC and ILC, and emphasize the unique signals involving the Standard Model-like
Higgs boson as a new search reference. The electroweakino signal from pair
production and subsequent decay to Wh/Zh (h to b\bar{b}) final state may yield
a sensitivity of 95% C.L. exclusion (5sigma discovery) to the mass scale M_2,
\mu ~ 350-400 GeV (220-270 GeV) at the 14 TeV LHC with an luminosity of 300
fb^{-1}. Combining with all the other decay channels, the 95% C.L. exclusion
(5sigma discovery) may be extended to M_2, \mu ~ 480-700 GeV (320-500 GeV). At
the ILC, the electroweakinos could be readily discovered once the kinematical
threshold is crossed, and their properties could be thoroughly studied.
