open primary
Noun
Meaning
a primary in which any registered voter can vote (but must vote for candidates of only one party)
Source: WordNetHypernyms
Examples
It side-slips on the air, leading with the open primary feathers of its left wing and eases up to a hovering standstill above a small clearing of grassy hillside amid crowding whin bushes.
In the heavily Democratic 15th district, his challenge will come from a fellow Democrat, just as he took advantage of the open primary to challenge 20-term incumbent Pete Stark and then won in the general election.
Therefore, we invent an open primary, and we promote it as "good government."
What if this were red-state Kansas, and an open primary promised the same perennial exclusion of the Democratic Party?
An Act replacing the Political Party Primary with an Open Primary System and Ranked-Choice General Election, and Requiring Additional Campaign Finance Disclosures.