  We show that if G is an anisotropic, semisimple, absolutely almost simple,
simply connected group over a field k, then two elements of G over any field
extension of k are R-equivalent if and only if they are A^1-equivalent. As a
consequence, we see that Sing_*(G) cannot be A^1-local for such groups. This
implies that the A^1-connected components of a semisimple, absolutely almost
simple, simply connected group over a field k form a sheaf of abelian groups.
