  We consider general relativistic magnetohydrodynamics from a charged
multifluids point-of-view, taking a variational approach as our starting point.
We develop the case of two charged components in detail, accounting for a
phenomenological resistivity, providing specific examples for pair plasmas and
proton-electron systems. We discuss both cold, low velocity, plasmas and hot
systems where we account for a dynamical entropy component. The results for the
cold case (which accord with recent work in the literature) provide a complete
model for resistive relativistic magnetohydrodynamics, clarifying the
assumptions that lead to various models that have been used in astrophysical
applications. The analysis of the hot case is (as far as we are aware) novel,
accounting for the relaxation times that are required to ensure causality and
demonstrating the explicit coupling between fluxes of heat and charge.
