That might be the case, but I edited my above comment with some links and will just add them here: Edit because apparently people don’t believe me. Googling “DNC mailers voter information” and I was able to pull up plenty of articles, though I do not have the letter I personally received. Please note that I know they are not from the DNC, I was just looking for generic words that google would associate with dems.

minnesotareformer.com/…/why-you-keep-getting-thos…

baltimoresun.com/…/maryland-ag-nonprofit-sending-…

cbsnews.com/…/voter-report-card-mailings-describe…

The second article (mentioning that they received a cease and desist for what the state deemed intimidation) says “The groups described themselves as nonpartisan, though their founder, Page Gardner, and CEO, Tom Lopach, are both former Democratic strategists.”