The Senate sent a letter Monday stemming from Gov. Ron DeSantis’ move Aug. 4 to suspend Warren.
DeSantis cited a pledge by the twice-elected state attorney to not enforce a new law preventing abortions after 15 weeks of pregnancy.
Warren, a Democrat, has vowed to fight DeSantis’ effort to ultimately remove him from office, with the Senate having authority under state law to hold a hearing and make a decision.
Warren will have 15 days to respond from when he receives the letter.
Brown also wrote that a Senate process would be held in “abeyance” if Warren decides to launch a court challenge.