Final answer:
Father Charles Coughlin criticized the Roosevelt administration because he felt the New Deal did not sufficiently defend labor, pursue monetary reform, or nationalize industries, leading him to advocate for more radical reforms.
Step-by-step explanation:
Father Charles Coughlin became a critic of the Roosevelt administration because he believed Roosevelt had not gone far enough in supporting labor, monetary reform, and the nationalization of key industries. Coughlin's perception was that the New Deal stopped short in its defense of these matters and was inadequate, prompting him to establish the National Union for Social Justice and leverage his weekly radio show to advocate for more radical reforms. Furthermore, Coughlin disagreed with Roosevelt's fiscal strategies and policies, finding them too conservative and hesitant in addressing the country's economic problems.