The sheer stupidity of this accounts for the fact you've probably already seen it; it's heavily shared. I'm sure the Virginia-based, fake official-sounding group that put it out - Public Advocate of the United States - thinks that's because it's nasty-ass message (um, pun) is resonating with voters. And actually, it's because people are laughing at these idjits.
Cory Booker's name's misspelled (which they now say is "intentional," like we haven't all seen the mighty-righty, pious Christianity-claiming, get-off-my-lawners display that kind of ignorance before). Them, and the professional, well-funded groups that encourage their fear of others, convincing them their free-floating anxieties, or even their real concerns are because of whatever despised "other" they can direct people to resent.
As Matt Friedman tells us, the other side of the mailer - so pink - says that Jeff Bell filled out their group's survey, earning a "100% pro-family rating". And they refer to Bell, who's never been elected to anything, "Senator." Booker, they say, gets a 0% Pro-Family rating because of his praise for homosexual 'marriage' and co-sponsoring the Gay Bill of Special Rights. As though that's a thing.
Bell & Booker are currently engaged in their one-and-only-debate this cycle. But we just tweeted to the dude (who btw has only 752 followers) asking if he intends to denounce the ad, which is so obviously is on his behalf. Feel free to RT.