[2] In 2009 he launched (via his nonprofit, the Harlan Institute[3]) FantasySCOTUS, a United States Supreme Court prediction market.

[citation needed] He has appeared as a speaker for the Federalist Society,[6] and is an adjunct scholar at the Cato Institute.

[8] In 2015, Blackman represented Defense Distributed in their First Amendment challenge to the International Traffic in Arms Regulations ban on 3D printed gun files.

[10] On March 29, 2018, at a Federalist Society event hosted by CUNY Law School, Blackman's presentation was disrupted by campus protesters.

[11] Blackman later shared a video of the incident, in which he was heckled and shouted down for approximately ten minutes before the protestors left the room.