What is the last step in the lawmaking process

The president has to sign it, or use his veto power.

Explanation:

In the United States, the president has the ability to veto the legislation that has passed through Congress, but this right is not absolute. A qualified 2/3 majority of both houses can pass a law, even against a presidential veto; however, if the proposed law has only a simple majority, the president's veto is decisive.

the tariff was created to protect industry in the northern part of the united states. industries in the north were being driven out of business by imported goods that were priced at a low rate. the goal was to protect these industries   by taxing the goods.