In September 1917, he was appointed counsel to a commission, the President's Mediation Committee, established by President Wilson to resolve major strikes threatening war production. Among the disturbances he investigated were the 1916 Preparedness Day Bombing in San Francisco, where he argued strongly that the radical leader Thomas Mooney had been framed and required a new trial. He also examined the copper industry in Arizona, where industry bosses solved industrial relations problems by having more than 1,000 strikers forcibly deported to New Mexico. Overall, Frankfurter's work gave him an opportunity to learn firsthand about labor politics and extremism, including anarchism, communism and revolutionary socialism. He came to sympathize with labor issues, arguing that "unsatisfactory, remediable social conditions, if unattended, give rise to radical movements far transcending the original impulse." His activities led the public to view him as a radical lawyer and supporter of radical principles. Former President Theodore Roosevelt accused him of being "engaged in excusing men precisely like the Bolsheviki in Russia."