  We report $^{31}$P and $^{29}$Si NMR in single crystals of
URu$_2$Si$_{2-x}$P$_x$ for $x=0.09$ and $x=0.33$. The spectra in the $x=0.33$
sample are consistent with a homogenous commensurate antiferromagnetic phase
below $T_N \sim 37$ K. The Knight shift exhibits an anomaly at the coherence
temperature, $T^*$, that is slightly enhanced with P doping. Spin lattice
relaxation rate data indicate that the density of states is suppressed for
$x=0.09$ below 30 K, similar to the undoped compound, but there is no evidence
of long range order at this concentration. Our results suggest that Si
substitution provides chemical pressure without inducing electronic
inhomogeneity.
