On July 5, Arizona advocates of a top-two open primary initiative will submit their petitions to the Secretary of State. They need 259,213 valid signatures and say they have, or will have, about 340,000. The proponents call their initiative the “Open Government/Open Primary” measure, although there is no obvious connection between “open government” and type of primary system. To most people, “open government” means that government decisions are made in public and adhere to a freedom of information principle.
Even the use of “open primary” is misleading. “Open primary” has been defined in political science textbooks since 1907 as a system, pioneered by Wisconsin in 1907, that provide for partisan nominations and partisan primaries, but lets any voter on primary day choose any party’s primary ballot. By contrast, in a top-two system, there are no partisan primary ballots and no party nominees.
Current vocabulary about primary systems is in disarray, however. Current law in Arizona lets independent voters choose any party’s primary ballot on primary day. In 2004, when a top-two open primary initiative was on the ballot in California, Senator John McCain of Arizona endorsed it. He said, “We have an open primary in Arizona and it’s working well.” So, at least in 2004, Senator McCain considered that Arizona already had an open primary. Actually, the primary system Arizona has now is generally referred to in political science books as a “semi-closed” (or, sometimes, “semi-open”) primary.