What is the oath that the president must say before taking office?

It's called the oath of office

And the oath goes something like this

I (Name here) do solemnly swear that I will faithfully execute the Office of President of the United States, and will to the best of my Ability preserve protect and defend the Constitution of the United States So help me god.

several states had passed similar laws, but they were limited to intrastate businesses. the sherman antitrust act was based on the constitutional power of congress to regulate interstate commerce.

you answered my friends question just to get the coins you didn't even give a valid response.

four sitting presidents have been assassinated while in office but the first was abraham lincoln,