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.

if the government does something the people dont like i tihnk threre would be a revolt