The structure of helical electromagnetic waves, with a longitudinal component, provides a mechanism that can account for Newtonian gravity instantaneous influence-at-a-distance. Basic electromagnetic principles applied to helical electromagnetic field structures identify a contiguous alignment from the point of origination to the point where the electromagnetic field has propagated. Once the electromagnetic field has propagated at the speed of light to some point, the influence of the field-to-field coupling may not be limited to the speed of light.