  Dynamic cluster quantum Monte Carlo calculations for a doped two-dimensional
extended Hubbard model are used to study the stability and dynamics of $d$-wave
pairing when a near neighbor Coulomb repulsion $V$ is present in addition to
the on-site Coulomb repulsion $U$. We find that $d$-wave pairing and the
superconducting transition temperature $T_c$ are only weakly suppressed as long
as $V$ does not exceed $U/2$. This stability is traced to the strongly retarded
nature of pairing that allows the $d$-wave pairs to minimize the repulsive
effect of $V$. When $V$ approaches $U/2$, large momentum charge fluctuations
are found to become important and to give rise to a more rapid suppression of
$d$-wave pairing and $T_c$ than for smaller $V$.
