With the newest tabulation of votes, updated at 2:43 today, Ron Barber is again in the lead against his Republican opponent Martha McSally.
The latest numbers show him to have 123,650 votes to McSally's 123,064 an advantage of only 584 votes.
Barber does, however, appear to be gaining the most ground in Pima County. With results that were updated today at 1:58 p.m., he's leading by more than 7,000 votes a tally of 110,987 to 103,264.
The latest state results can be found here.