  In this paper, we exhibit non-uniqueness of Leray weak solutions of the
forced magnetohydrodynamic (MHD for short) equations. Similar to the solutions
constructed in \cite{ABC2}, we first find a special steady solution of ideal
MHD equations whose linear unstability was proved in \cite{Lin}. It is possible
to perturb the unstable scenario of ideal MHD to 3D viscous and resistive MHD
equations, which can be regarded as the first unstable "background" solution.
Our perturbation argument is based on the spectral theoretic approach
\cite{Kato}. The second solution we would construct is a trajectory on the
unstable manifold associated to the unstable steady solution. It is worth
noting that these solutions live precisely on the borderline of the known
well-posedness theory.
