Democratic lawmakers are expected to schedule a hearing this week to ask questions of Attorney General Adam Laxalt about corruption allegations that federal authorities have already dismissed.
Gaming Control Board Chairman A.G. Burnett said he asked the FBI in spring 2016 to review information he worried might constitute a pay-to-play scheme involving casino representatives.
The FBI told Burnett that Laxalt committed no criminal violations, Burnett said.
Laxalt is considered a front-runner for governor in 2018, though he has not declared his candidacy.
Laxalt denies wrongdoing, saying in written statements that his actions were part of the job of attorney general and Democrats calling for the hearing are engaging in a political stunt.
Meanwhile, an ongoing investigation into a claim of sexual harassment against a longtime state lawmaker continues into this week.
Republican state senators pressed the Democratic majority to take swift action against Sen. Mark Manendo.
The Las Vegas Democrat denies wrongdoing through an attorney.
The Senate Majority Leader, Aaron Ford of Las Vegas, appointed an independent investigator earlier this month to look into the claims.
KNPR's Casey Morell contributed to this story.