There will be a Republican primary August 23. There will be no Democratic primary. All registered voters can vote in a primary regardless of party affiliation. All the different positions will be in the primary, from State senate, state delegate and local supervisor.
Here is who is running for State Senate:
13th District:
John Stirrup (R)
Robert FitzSimmonds (R)
Richard Black (R)
28th District:
Incumbent: Richard Stuart (R)
29th District:
Incumbent: Charles Colgan (D)
36th District:
Incumbent: Linda “Toddy” Puller (D)
Jeffrey Frederick (R)
Tito Munoz (R)
39th District:
Incumbent: George Barker (D)
Miller Baker (D)
Scott Martin (R)
I am not sure about the 39. There appears to be an extra democrat in the mix.