AP
Brewer's statement will come at 7:45 p.m. ET - 5:45 p.m. MT.
Reports on Tuesday suggested that Brewer would likely veto the bill, amid increasing pressure from politicians on both sides of the aisle and major businesses to do so. Brewer's office denied late Tuesday that she had made a decision.
Both of Arizona's U.S. senators - Republicans Jeff Flake and John McCain - have urged Brewer to veto the bill, along with former Republican presidential candidate Mitt Romney.
More businesses came out against the legislation on Wednesday, including JPMorgan Chase and American Express. Sports Illustrated also reported that the NFL has begun exploring the option of moving next year's Super Bowl, which is scheduled to be held in Arizona.
We'll update this post when Brewer delivers her statement.