  In contrast to the recent prediction of high $p_T$ hadron suppression within
the parton saturation model, it is shown that multiple parton scattering
suffered by the projectile will enhance high $p_T$ hadron spectra in $d+A$
collisions relative to a superposition of binary $p+p$ collisions at RHIC. A
stronger enhancement in the forward rapidity region of the projectile is also
predicted, resulting in a unique rapidity asymmetry of the hadron spectra at
high $p_T$. The shape of the rapidity asymmetry should be reversed for low
$p_T$ hadrons that are dominated by soft and coherent interactions which
suppress hadron spectra in the projectile rapidity region. The phenomenon at
the LHC energies is shown to be qualitatively different because of parton
shadowing.
