  Based on the spectator expansion of the multiple scattering series we employ
a chiral next-to-next-to-leading order (NNLO) nucleon-nucleon interaction on
the same footing in the structure as well as in the reaction calculation to
obtain an in leading-order consistent effective potential for nucleon-nucleus
elastic scattering, which includes the spin of the struck target nucleon. As an
example we present proton scattering off $^{12}$C.
