At least one per day, usually more, never respond. Technology continues to evolve and change the game. I think the DNC mastered that first when Obama ran, but the GOP caught up. Recently, I was asked to run for local office and seriously considered it over the summer but the BS associated convinced me otherwise. I met numerous times with the local "leaders" who wanted me to run. They have an interesting machine and the local GOP group is moving away from flyers and TV ads with a huge focus on geo-fenced direct engagement. There is so much data on each one of us out there and the software uses it to know party affiliation, likeliness to vote, key demographic and geographic data points. From what they showed me (which I take with a grain of salt), in the last local election they used half the budget of the incumbent and defeated him by 15 points. For what it is worth, they still believe the attack ad sways voters. One of the reasons I dipped out was I told them I would not resort to attack ads under any circumstance.