To trigger the TGA something mindblowing but believable will need to be exposed. Able to be corroborated (MI?). Satan pedo babi eaters won't be it. Has to have gravitas and verifiable legs on which to stand.
So many senarios to choose from… Scalia, 911, SH, JFK, on and on. That will need to be an initial blow, irrefutable. Or maybe a raw video, never mind. OK, Scalia could work considering where we are today.