Status of nucleon structure calculations with 2+1 flavors of domain wall fermions

We report the status of our nucleon structure calculations with 2+1 flavors of domain wall fermions on the RBC-UKQCD ${32}^3\times 64$ gauge ensembles with the Iwasaki+DSDR action. These ensembles have a fixed lattice scale of 1/a = 1.37 GeV, and two pion masses of about 170 and 250 MeV. Preliminary results for the isovector electromagnectic form factors and their corresponding root-mean-squared (r.m.s.) radii will be presented.