Who presides over the Arizona Senate?

The President of the Senate is the correct answer because this individual is specifically designated by the Arizona Constitution to lead and manage the Senate's proceedings. This role involves not only presiding over debates but also ensuring that the rules and procedures of the Senate are followed. The President of the Senate is typically the elected member from the majority party, giving them authority and responsibility within the legislative process.

In contrast, the Speaker of the House oversees the House of Representatives, not the Senate, which clarifies why that is not the correct answer. The Governor does play a significant role in the legislative process, such as signing bills into law, but does not have a presiding role over either chamber of the legislature. The Chief Justice is the head of the judiciary and does not oversee legislative proceedings. Each of these other roles serves distinct functions that do not include presiding over the Senate.