  We report resonant x-ray scattering studies of charge and orbital order in
Pr_{1-x}Ca_{x}MnO_3 with x=0.4 and 0.5. Below the ordering temperature, T_O=245
K, the charge and orbital order intensities follow the same temperature
dependence, including an increase at the antiferromagnetic ordering
temperature, T_N. High resolution measurements reveal, however, that long range
orbital order is never achieved. Rather, an orbital domain state is formed.
Above T_O, the charge order fluctuations are more highly correlated than the
orbital fluctuations. Similar phenomenology is observed in a magnetic field. We
conclude that the charge order drives the orbital order at the transition.
