In case you didn’t notice, there is quite a difference between political parties amassing such data, and the federal government doing it. The federal government has far, far greater resources than the political parties, not to mention legal and police forces, the IRS, ICE, etc., etc., etc. All of these resources could be called into play to harass and suppress voters. And please don’t say “Oh, they wouldn’t do that.” History tells us that they would, especially in formerly democratic countries that have turned fascist regimes using these methods. Perhaps you’ve heard about what’s happening in Turkey? If not the linked article might be educational.
Furthermore, if Obama had done this, the right wing would have screamed bloody murder. And I would have, too, because the federal government has no business even looking at such data, much less collecting it.
Also, see the comment by @GulliverFoyle above:
Please try to learn some history! It’s easy, just by reading.
