  We develop a theory for charge and spin current between two canted magnetic
leads flowing through a quantum dot with an arbitrary local interaction. For a
noncollinear magnetic configuration, we calculate equilibrium and
nonequilibrium current biased by voltage or temperature difference or pumped by
magnetic dynamics. We are able to explicitly separate the equilibrium and
nonequilibrium contributions to the current, both of which can be written in
terms of the full retarded Green's function on the dot. Taking the specific
example of a single-level quantum dot with a large on-site Coulomb interaction,
we calculate the total spin current near the Kondo regime, which we find to be
generally enhanced in magnitude as compared to the noninteracting case.
