Bremberg doesn't generate a lot of press for himself, but he has deep roots in the traditional Republican party, having worked for former President George W. Bush's administration and under Senate Republican Leader Mitch McConnell and former Wisconsin Governor Scott Walker.
As one of the Twitter users behind the blog "Our Bad Media" (which has exposed plagiarism by Fareed Zakaria and Malcolm Gladwell), @blippoblappo, explained on Twitter, Bremberg's role as head of the Domestic Policy Council focuses largely on deregulation, the first thing that was emphasized as a success under Trump in the op-ed.
The Hill profiled Bremberg in February 2017 and described him as Trump's "details guy." It's the most comprehensive media attention paid to Bremberg thus far. He isn't a very buzzy figure in the Trump administration, and his Google search results and social media mentions are significantly less dense than the oft-suggested candidates for the anonymous authorship.
"Some White House aides know little about Bremberg," The Hill reported. But behind the scenes, he wrote a harsh memorandum on immigration – the type of traditional Republican policy heralded by the op-ed writer.
The Hill also wrote that those who know Bremberg were "encouraged" by his presence in the administration to defend the party.
"'It was encouraging to a lot of people who were a little nervous about Trump," one source told the Hill, adding that they thought he could "preserve the peace in the party."
'They knew the traditional principles would be preserved," the source told the outlet.
The lack of mainstream attention could put Bremberg in a good position to keep publishing material about the "resistance" from within because the work itself is what's getting the headlines and buzz, not him.
Of course, all of these reported suspicions are unconfirmed. But as Republicans slip out of the White House one by one, there aren't too many staunch traditionalists left behind in Trump's White House who ring the anonymous author alarm.