  We report detailed thermodynamic and transport measurements for
non-superconducting La$_{1.7}$Sr$_{0.3}$CuO$_4$. Collectively, these data
reveal that a highly-correlated Fermi-liquid ground state exists in
La$_{2-x}$Sr$_x$CuO$_4$ beyond the superconducting dome, and confirm that
charge transport in the cuprates is dominated at finite temperatures by intense
electron-electron scattering.
