  The DUNE Near Detector design consists of multiple components, each designed
to produce complementary constraints on flux and neutrino interaction
systematic uncertainties for the oscillation analyses. One of these
subdetectors is a magnetized high-pressure gaseous-argon TPC (HPgTPC), which
will provide fine-grained tracking in a low-density detector, using the same
target nucleus as the DUNE far detector. With its low momentum threshold for
particle detection, the HPgTPC will be able to constrain one of the most
crucial - and least-well understood - uncertainties for the oscillation
analysis: nuclear effects in neutrino-argon interactions. These proceedings
describe the current design, physics goals, and projected performance of the
HPgTPC, as well as the ongoing R&D work at Fermilab, in which a test-stand TPC
is being built and will be operated at up to 10 atm pressure.
