  We analyze the radiative correction to high energy elastic electron-proton
scattering of polarized electrons. We show that if the approximations inherent
in the calculations developed by Tsai and given in the work of Mo and Tsai,
which have been used in the analysis of almost all experimental data pertaining
to medium and high energy elastic electron scattering for the past three
decades, are maintained, then the same radiative correction applies both in the
case of initially polarized and unpolarized electrons.
