IL-09 Republican nominee?
$4.1K
MAR 24, 2026Primary Election
Party selects its nominee.
Overview
Current roleIT consultant
PartyRepublican
Political ideologyConservative Republican
LocationIllinois
BackgroundIT consultant
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EducationMaster's degree, University of Illinois Chicago (UIC)
Notable personal detailsDongbo “Mark” Su is a Republican candidate for the U.S. House in Illinois’ 9th Congressional District. He has worked as an IT consultant and has described himself as a senior software engineer, as well as a media creator and writer. He holds a master’s degree from the University of Illinois Chicago.
SourcesShowHide
Positions
Economy & Taxes
The candidate advocates cutting federal spending and federal aid programs, privatizing some government services, and supporting small businesses and job growth. Platform items emphasize reducing government size and improving economic efficiency rather than expanding taxes or redistributive programs.
Healthcare
Mark Su has said he wants to make sure most families are insured and that low-income and disabled residents receive proper coverage, and he has stated Congress should "set regulation to reform" rising healthcare costs. His public statements on healthcare are general and do not clearly endorse specific policies like ACA expansion, a public option, or single-payer.
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Immigration & Border
Supports strengthening border security, including continued construction of a border wall, and favors removing immigrants who commit crimes; has expressed concern about immigration fraud (fake green cards).
Abortion & Reproductive Rights
The candidate supports ending or sharply restricting abortion access and lists stopping or reducing abortion as a campaign priority. The campaign frames this position as supporting “life” and halting abortion rather than protecting abortion access.
Public Safety & Guns
Mark Su has stated support for 'gun control' as part of his campaign priorities, but public reporting and his candidate materials do not provide detailed policy commitments (for example, on assault weapons bans, universal background checks, or red flag laws). Available sources describe a general pro-regulation stance without enumerating specific legislative proposals.
News
Mark Su is running in the Republican primary for Illinois’ 9th Congressional District, competing for the seat being vacated by retiring Democrat Jan Schakowsky. In the campaign, he has emphasized border security and fraud prevention as part of his immigration platform. The primary is scheduled for March 17, 2026, and immigration and gerrymandering are major issues shaping the race.
Fundraising
Latest report: Cycle 20262026
LatestCycle 2026
Source: FEC
New updates coming soon
We're monitoring and will update when new data impacts the race.
- Polls
- Endorsements