Republican McCain seeks 6th term, faces two primary election opponents.
No contests for 7 Senate seats; 4 districts have competition for House seats.
1st District crowded with Republicans; will 2nd go to wire again? 3rd is no contest.
Incumbent LaWall touts experience; challenger Feinman challenges that record.
Both measures under challenge; deadline for ballot certification is Tuesday.
Some tips about voting, including what to do with early ballots.
Arizona Week sits down with top strategists to talk about the historic campaign season.
Plus: a preview of Tuesday's primary election; why the "digital divide" is shrinking for Tucson-area Latinos.
Political scientist Samara Klar thinks turnout could swing to either extreme.