From National Journal:
Data Trust—a privately operated entity backed by the Republican National Committee that maintains a master list of voter information nationwide—is rolling out a marquee technical upgrade that will allow Republican campaigns and their allies to share voter information with one another in real time. The new feature will let campaigns and approved outside groups not only access voter information anytime (with their own data software) but update it instantly, so others viewing the voter lists can see the information immediately.
Hypothetically, if the Chamber of Commerce and NRA both used Data Trust, the gun-rights group could learn about the Little Rock gun owner minutes after the chamber reached out to him or her, and have its own volunteer on the voter’s doorstep the next day.