Asides some tweets referencing DJT Jr., here are some tweets circa 2016

http://time.com/4538245/jk-rowling-tweet-donald-trump/

Asides the Time article in Rowling's tweet from previous,

There was a it will be magical post referencing later events by Q.

J.K. Rowling’s Twitter War With Trump Supporters Is Magical

https://m.huffpost.com/us/entry/us_5890a974e4b0522c7d3d1156

I recall a reference to dumbledore's army and state dept. but can't find the sauce.

But shifting gears,

https://www.jacobinmag.com/2017/06/corbyn-jk-rowling-obama-blair-macron

Which takes us to this blog about Rowling and the Fabian Society influence.

https://zaidpub.com/2011/12/01/appendix-iii-harry-potter-fabians-jesuits-rhodes-fulbright-scholars/

No wonder that there was no sauce.

http://www.businessinsider.com/cfpb-dumbledores-army-trump-mick-mulvaney-2017-12

CfPB was it