Incumbent Rep. Jim Baird commands 72% trader consensus as the Republican primary winner for Indiana's 4th Congressional District, reflecting his strong incumbency advantage, fundraising dominance per latest FEC filings, and muted challenger momentum. Craig Haggard trails at 12% amid limited polling visibility and grassroots traction, while John Piper lingers at 0.5% as a fringe contender. No major developments—such as endorsements, debates, or scandals—have emerged in the past 30 days to alter dynamics, reinforcing historical base rates where House incumbents secure over 90% of primaries in safe districts like IN-04 (R+25). The May 7 primary looms, with potential for low-turnout volatility.