For simple models of the nuclear charge operator, measurements of the
Coulomb sum and the charge form factor of a nucleus directly determine
the proton-proton correlations. We examine experimental results obtai
ned for few-body nuclei at Bates and Saclay using models of the charge
operator that include both one- and two-body terms. Previous analyses
using one-body terms only have failed to reproduce the experimental r
esults. However, we find that the same operators which have been used
to successfully describe the charge form factors also produce substant
ial agreement with measurements of the Coulomb sum.