Did not know Google is sharing lists of users of apps with DNC...Guess that is legal? Dunno.
Are you using Apple computer? If not, what search engine do you use. Just wondering.
I use Bing or DuckDuckGo. The later does not track.
Microsoft does not share detailed data with the political parties or government except by order.
Google sharing is legal, their user agreement provides them great latitude. The sad thing is it is not just search info with Google that is the problem. It is your email big data, call information and contacts from android devices and app info from the store.
Facebbok shares data but big and detailed. Most people do not realize that Facebook captures ALL keystrokes even those in a written context that you delete and do not post.