Indiana Senate District 15 covers a portion of Allen County, including northeast Fort Wayne and surrounding areas. It is a safe Republican seat -- incumbent Liz Brown ran unopposed in 2022 and won with 55.4% in 2018, her only contested general election. The question in 2026 is not which party wins. It is which faction of the Republican Party controls the seat.
That question has produced one of the most unusual dynamics in Indiana politics this cycle: a Republican incumbent endorsed by Donald Trump, running against a Republican challenger endorsed by Trump's two most prominent Indiana allies -- U.S. Senator Jim Banks and Attorney General Todd Rokita. The same president whose endorsement is supposed to be the ultimate weapon in Republican primaries is, in SD-15, on the opposite side of a fight from the two men who most aggressively carry his banner in the state.
To understand how Trump, Banks, and Rokita ended up on opposite sides, you have to follow two threads: redistricting and immigration.
When the Indiana Senate voted 31-19 to kill Trump's mid-decade redistricting proposal on December 11, 2025, Liz Brown was one of its most vocal supporters. She had pushed her colleagues to pass the 9-0 Republican map. When the vote failed, she resigned her position as assistant majority floor leader the next day. By late December, Senate President Pro Tem Rodric Bray had removed Brown from the Judiciary Committee chairmanship she had held since 2021.
On redistricting, Brown was a Trump loyalist. Trump recognized this on March 25, 2026, when he endorsed her alongside 16 other posts about Indiana Senate races, calling her "a MAGA Warrior."
The feud between Brown and the Banks-Rokita axis predates the redistricting vote and centers on immigration enforcement legislation. In the 2025 session, House Bill 1531 passed the House 64-26 and arrived in Brown's Judiciary Committee. Brown, an attorney, raised legal concerns about the bill and declined to give it a hearing. The bill died without a Senate vote.
This enraged Rokita, who escalated the dispute beyond policy disagreement into personal attack. In a radio interview, Rokita alleged that Brown had killed the bill because "she's got a family member who's an illegal alien." Brown called this "blatantly false" and filed a professional misconduct complaint against Rokita.
By July 2025, dark-money text messages funded by Hoosier Leadership for America -- the 501(c)(4) nonprofit linked to Jim Banks -- were circulating in northeast Indiana attacking "Liberal Liz." Banks and Rokita had found their challenger: Darren Vogt, who works on Banks' Senate staff as field operations and special assistant.
The SD-15 split illuminates a fracture within Indiana's MAGA coalition that is not ideological in any conventional sense. Brown and Vogt hold functionally identical policy positions on paper. The dispute is about something else: legislative process versus executive compliance. Brown exercised the traditional prerogative of a committee chair to evaluate legislation on legal merits before advancing it. In the Banks-Rokita model of governance, the role of a state legislator is to pass what the movement demands, when the movement demands it.
The SD-15 race is, at bottom, a test of whether the Republican base in Fort Wayne responds to the Trump brand (which endorses Brown) or the Trump infrastructure (which endorses Vogt). The answer will tell us something about how endorsement politics works -- or doesn't -- when the principal and his agents disagree.