As a congressman, Palmer aligned himself with the progressive wing of the Democratic Party, advocating lower tariffs despite the popularity of tariffs in his home district and state. In his second term, he won a seat on the Ways and Means Committee chaired by Oscar Underwood. There he was the principal author of the detailed tariff schedules that a Republican Senator denounced as "the most radical departure in the direction of free trade that has been proposed by any party during the last 70 years." He argued that tariffs profited business and had no benefit for workers. Pennsylvania industry, notably the large mining and manufacturing firms, opposed his tariff scheme, which pleased Palmer, who stated: "I have received my notice from the Bethlehem Steel Company. ... I am marked again for slaughter at their hands."