Using the Polarized Fock State (PFS) representation, we provide a simple theory to explain how electronic strong coupling can modify the ground state polariton potential. We show that when coupled to the cavity, the diabatic couplings between Mulliken-Hush diabat states (which are the eigen-states of the electronic dipole operator) are modified. Using this theoretical framework, an increasing light-matter coupling will lead to a decrease of the diabatic coupling. In the infinite coupling limit as the diabatic couplings go to zero, the MH diabats tensor product with the polarized Fock states become the eigenstates of the light-matter Hamiltonian (see Eq. 16). Consequently, as the coupling strength increases, the ground state polariton PES approaches the lowest energy matter Mulliken-Hush diabatic state (see Eq. 17). This simple but intuitive theory explains several recently observed ground state modifications due to strong light-matter interactions. In this paper, we demonstrate with model 3level Shin-Metiu model systems that this modification of the ground state, either leads to a decrease of the relative barrier height (for Model I in Fig. ), or a decrease of the avoided crossing between ground and excited states (for Model II in Fig. ). This novel change in the ground-state chemical reactivity is achieved through electronic strong coupling as opposed to the more common use of vibrational strong coupling for modifying the ground-state chemical reactivity. This work provides a simple but powerful theoretical framework to understand how strong coupling between molecule and cavity can modify ground state reactivities.