Democratic Senate candidate Kyrsten Sinema’s campaign said she will not be making remarks, given the large number of uncounted ballots remaining.
In the race with Republican Martha McSally, 94 percent of votes have been counted, and it’s neck and neck.
Murphy Hebert, spokesperson for the Maricopa County Recorder’s Office, said trucks are still coming in with data packs.
The Recorder’s Office on Wednesday will be verifying signatures on early voting ballots, and the next update from won’t be until 5pm on Thursday.
Arizona’s Secretary of State Garrett Archer said there are approximately 920,000 votes outstanding in Arizona.
He believes 500,000 will still be counted today.
That still leaves a significant number of votes yet to be counted, in addition to the early ballots.
A Republican source said they don’t believe a winner for the Arizona midterm elections Senate race will be announced until Friday or Saturday.
READ MORE: Follow our LIVE COVERAGE as results come in
How are other results looking?
For the Senate, the Democrats have lost two seats, and the Republicans have gained two.
The Dems are holding a total of 45 seats in the Senate, and the Reps a total of 51.
There are four seats to still be declared.
But it is already expected that a Democratic upset has failed to materialise for the House, as predicted.
READ MORE: Midterm results are in, so what happens now?
In the House, the Democrats have gained 26 seats, and the Republicans have lost 26.
This gives the Dems a total of 218, and the Reps a total of 193.
A total of 218 seats are needed for a majority, which means the Democrats have officially taken back the House.
There are 24 seats to still be declared.
The House loss means Donald Trump will face investigations into his tax returns, his businesses and his administration by Democratic lawmakers.
His legislative agenda, including a proposal for a middle-class income tax cut, is likely stalled.
Reuters reported one adviser, who asked to remain anonymous, saying: “I don’t think he fully comprehends what this means by giving the gavel to (Democratic House leader) Nancy Pelosi and her cronies.”
But there was some satisfaction among Mr Trump and his aides that the losses were not as bad as had been projected by strategists who said a Democratic “blue wave” would take away 40 House seats.