If the ACA is repealed, with it will go the protection it offers individuals with preexisting health problems. They would again be denied health insurance or subjected to unaffordable insurance premiums.
The rapid transition from a non-conducting to a conductive state produces a brief emission of light and a sharp crack or snapping sound. A spark is created when the applied electric field exceeds the dielectric breakdown strength of the intervening medium.
This switching ON and OFF of the Ground is what makes the Ignition Coil fire off spark for the Spark Plugs. The Switching Device needs a Triggering Signal from a Triggering Device to let it know when to create and feed the Switching Signal to the Ignition Coil.