John Piper
Republican candidate for U.S. House in Indiana
IN-04 Republican nominee?
$14.5K
MAY 12, 2026Primary Election
Party selects its nominee.
Live Odds — IN-04 Republican nominee?
Current prediction-market probability for the candidate, updated as market prices change.
0.2%chance to win
$14.5KMAY 12, 2026Candidate Overview
Key details about the candidate’s background, party, office sought and current campaign.
Current roleVeterinarian
PartyRepublican
LocationIndiana
BackgroundVeterinarian
Notable personal detailsJohn P. Piper is a Republican candidate who has run for U.S. House in Indiana's 4th Congressional District. He has described himself as a veterinarian and has been identified in election coverage as a veterinary hospital owner and restaurateur. He has previously been listed as a Republican candidate in Indiana’s 4th District in the 2024 cycle and has remained active as a candidate in subsequent cycles.
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Latest News
John Piper is in the news because he is tied to the Kentucky 4th Congressional District Republican primary, where Trump-backed Ed Gallrein defeated Rep. Thomas Massie. Recent reports say Gallrein won by nearly 10 percentage points, ending Massie’s bid for another term. The race has been framed as a test of Donald Trump’s influence over Republican primaries and drew heavy outside spending.
AP Decision Notes: What to expect in Indiana's state primaries
What to know about Indiana’s 2026 primary elections
Takeaways from Tuesday's primaries: Massie's loss leaves no doubt about Trump's power over the GOP
Trump owns the GOP. Could Republicans pay the price in the midterms?
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We're monitoring and will update when new data impacts the race.
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