Following the reconfiguration of Florida House of Representatives districts in 2012, the 7th District was created, which sprawls across many counties in northern Florida. Beshears opted to run in this district, and defeated Mike Williams, former State Representative Jamey Westbrook, and Don Curtis in the Republican primary, winning 38% of the vote. In the general election, Beshears faced Robert Hill, the Democratic nominee and the former Liberty County Administrator, Clerk of Court, and Public Schools Superintendent. Beshears was criticized by the Tallahassee Democrat for displaying a "marked lack of interest" and they noted that they "just don't get" his popularity within the district. In the end, however, Beshears swamped Hill, winning every county in the district except for Liberty County, which Hill carried comfortably. In 2014, Beshears was re-elected without opposition to his second term. While serving in the Florida House of Representatives, Beshears proposed legislation to protect "agricultural lands from being subject to double regulations at both the local and state or federal level." When confronted with legislation that would "outlaw all sales of various smoking devices defined as 'drug paraphernalia,'" Beshears took a strong stance against it, declaring, "The government can intrude in any business, and I just completely disagree with that. So if we're going to outlaw smoking paraphernalia, why don't we outlaw spoons, why don't we outlaw aluminum cans, why don't we outlaw anything that is used to smoke?" After a University of Florida study showed that the oyster population in Apalachicola Bay was dwindling, he called for drastic solutions, asserting, "We're going to have to change our harvesting practices there to give the time to grow adequately, to where they can catch up," affirming that the overharvesting of oysters "raped the land." Beshears was re-elected to his second and third term in the legislature in 2014 and 2016 without opposition. During the 2014 session of the Florida Legislature, Beshears sponsored a bill in the Florida Legislature that made application to Congress to convene an Article VConvention to propose amendments to the United States Constitution for the limited purpose of proposing a Single Subject Amendment. This bill passed the Florida Legislature making Florida the first state in United States history to apply for an Article V Convention to propose this amendment to the United States Constitution. See the April 23, 2014 entry in List of state applications for an Article V Convention.
On December 11, 2018, Governor-Elect Ron DeSantis announced he would appoint Beshears as secretary of the Florida Department of Business and Professional Regulation in his new administration. Beshears resigned from the House of Representatives and took office as DBPR secretary on January 11, 2019. On 06/25/2020 Gov. Ron DeSantis publicly announced “We’re not going back, closing things,”. On 06/26/2020, around 11am EDT, Halsey Beshears in his role as secretary of the Florida Department of Business and Professional Regulation issued Executive Order 2020-09 closing all vendors selling alcoholic beverages on premises with the exception of places with also sell 50% or more of food,, effective immediately. Bars were just allowed to reopen with Florida entering phase 2 on 06/05/2020, 3 weeks prior, after being closed since 03/17/20. Bar owners around the State were shocked, since they just restocked their inventory. In a press conference the same day, Gov. Ron DeSantis announced the new bar closures. Several lawsuits have been filed against Gov. Ron DeSantis and DPBR.
