although they did send this ask to multiple people, someone in the comments suggested it was senator mike folmer (resigned in 2019)
https://www.pennlive.com/news/2019/09/after-former-pa-sen-folmers-arrest-experts-discuss-social-medias-role-in-child-porn-investigations.html
the email address that senator mike folmer used to sign up for tumblr was [email protected]
did you know you can look users up by email if you go to your following page? i didn’t lol but if you enter his address
you get a snarky message from tumblr staff about your choice to follow the account they closed for child pornography run by a US senator, which was hoser44… of course, all the posts are gone
however, if you enter hoser44.tumblr.com into the wayback machine, there are results
inconclusive. mike folmer did not run a steven universe blog. he ran a MILF blog, which was shut down for posting child pornography. perhaps the anon is referring to a different republican senator…?