If a major union pension fund or university endowment has an investment with Cerberus, it surely doesn’t want to be tarred as a passive owner of the company that sells semi-automatic weapons with no background checks or concern for the use of the weapons,” Spitzer wrote. “Those investors have enormous leverage over the Cerberus. And all those investors collectively, if they spoke with one voice to the management team at Cerberus, could wield vast power.” Spitzer wrote to the Teacher Unions who hold capital in assult weapons and have for more than 25 years.