Sauce's sauce's sauce:
https://www.americanthinker.com/blog/2020/09/lefties_at_emthe_nationem_discover_that_nonfbi_feds_have_been_tracing_the_puppet_masters_behind_antifa_and_blm.html
..and their sauce:
https://www.thenation.com/article/politics/homeland-security-portland/