2 candidates are tracked for District Attorney, 21st Judicial District, headed to a November 3, 2026 runoff: Brad Cascio and Sherman Mack. Candidate information follows official St. Helena Parish election filings; verify with the official election office linked below.
Brad Cascio and Sherman Mack are on the November 3, 2026 open primary ballot for district attorney of the 21st Judicial District. Every voter in Tangipahoa Parish, Livingston Parish, and St. Helena Parish elects this seat, since Louisiana district attorneys are elected district-wide across the 21st Judicial District (La. R.S. 13:477). Louisiana's open primary elects a candidate outright with a majority of the vote; otherwise the top two finishers meet in a December 12, 2026 runoff. Listed from the Louisiana Secretary of State's official candidate list.
District attorney or prosecutor. The district attorney is the chief prosecutor for the county or judicial district. The office decides which criminal charges to file, negotiates pleas, tries cases and, in many states, advises county government or handles child support and juvenile matters. The office sets local charging and diversion policies within state law.
This race. Every voter in St. Helena Parish votes on this seat.
Louisiana › St. Helena Parish › District Attorney, 21st Judicial District
Republican
Brad Cascio is an Assistant District Attorney for the 21st Judicial District, a post he has held since 2013, per his campaign site. He also serves as City Prosecutor for Denham Springs and French Settlement and sits on the boards of the Capital Area Law Enforcement Planning Commission and the Tangipahoa Council on Aging, per his campaign site. He is a graduate of Southeastern Louisiana University and LSU Law School, per his campaign site.
Republican
Sherman Mack, a former Louisiana State Representative and lifelong resident of Livingston Parish, is a candidate for District Attorney of the 21st Judicial District, per his campaign site. He has 25 years of civil and criminal litigation experience and is the senior member of the Mack Law Firm, the largest law firm in Livingston Parish. While in the Legislature he was appointed chairman of the House Criminal Justice Committee, where he worked on criminal-justice policy with the Attorney General's office and the state district attorneys association.
Who is running for District Attorney, 21st Judicial District in 2026?
2 candidates are tracked for District Attorney, 21st Judicial District, headed to a November 3, 2026 runoff: Brad Cascio and Sherman Mack. Candidate information follows official St. Helena Parish election filings; verify with the official election office linked below.
When is the District Attorney, 21st Judicial District election in Louisiana?
Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for Louisiana are on the Louisiana election hub at theballotbrief.com.
How do I see my exact St. Helena Parish ballot?
Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.
Candidate roster from official St. Helena Parish and state election office filings. Bios and priorities carry their attribution inline.
Cross-check with the official Louisiana election office, or see the full St. Helena Parish sample ballot and your exact ballot by address.
2 tracked races in St. Helena Parish, Louisiana. Landed here from another county's search? Look up your own ballot below.