Even in Prescott Bush's day, Republicans felt uneasy about Kennedy's tariff reductions.
I'm not saying protective tariff walls are a good thing, but there's much to be said for encouraging American industry.
Republican Platform of 1924
The Tariff
We reaffirm our belief in the protective tariff to extend needed protection to our productive industries. We believe in protection as a national policy, with due and equal regard to all sections and to all classes. It is only by adherence to such a policy that the well being of the consumers can be safeguarded that there can be assured to American agriculture, to American labor and to American manufacturers a return to perpetrate American standards of life. A protective tariff is designed to support the high American economic level of life for the average family and to prevent a lowering to the levels of economic life prevailing in other lands.
In the history of the nation the protective tariff system has ever justified itself by restoring confidence, promoting industrial activity and employment, enormously increasing our purchasing power and bringing increased prosperity to all our people.