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Industry · Transportation and Warehousing

Port and Harbor Operations

NAICS 488310 · 2,279 matched workers · high confidence

Strong Democratic lean
65.4% Democratic, 34.6% Republican

Two-party shares across 2,279 workers in the Port and Harbor Operations industry.

65.4%
34.6%
DemocraticRepublican
Imputed
64.7% D · 35.3% R
Includes lean for unaffiliated registrants
Hierarchy
Transportation and Warehousing › Support Activities for Water Transportation
NAICS2 48 · NAICS4 4883
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Where Port and Harbor Operations falls

More Democratic than 81% of industries in Transportation and Warehousing.

← DemocraticRepublican →Scheduled Passenger Air Transportation — 54% DemocraticFreight Transportation Arrangement — 52% DemocraticGeneral Freight Trucking, Long-Distance, Truckload — 47% DemocraticLine-Haul Railroads — 49% DemocraticAll Other Transit and Ground Passenger Transportation — 69% DemocraticDeep Sea Freight Transportation — 56% DemocraticGeneral Freight Trucking, Local — 50% DemocraticPipeline Transportation of Natural Gas — 35% DemocraticPacking and Crating — 59% DemocraticOther Support Activities for Air Transportation — 43% DemocraticGeneral Freight Trucking, Long-Distance, Less Than Truckload — 48% DemocraticScheduled Freight Air Transportation — 55% DemocraticDeep Sea Passenger Transportation — 62% DemocraticOther Airport Operations — 58% DemocraticAll Other Support Activities for Transportation — 55% DemocraticSpecial Needs Transportation — 61% DemocraticSchool and Employee Bus Transportation — 60% DemocraticUsed Household and Office Goods Moving — 50% DemocraticSpecialized Freight (except Used Goods) Trucking, Long-Distance — 50% DemocraticPipeline Transportation of Crude Oil — 38% DemocraticMarine Cargo Handling — 43% DemocraticMotor Vehicle Towing — 60% DemocraticSupport Activities for Rail Transportation — 56% DemocraticPipeline Transportation of Refined Petroleum Products — 37% DemocraticBus and Other Motor Vehicle Transit Systems — 66% DemocraticOther Support Activities for Road Transportation — 52% DemocraticInterurban and Rural Bus Transportation — 81% DemocraticNonscheduled Chartered Passenger Air Transportation — 40% DemocraticAir Traffic Control — 48% DemocraticNonscheduled Chartered Freight Air Transportation — 46% DemocraticOther Nonscheduled Air Transportation — 37% DemocraticNavigational Services to Shipping — 43% DemocraticInland Water Freight Transportation — 43% DemocraticTaxi and Ridesharing Services — 61% DemocraticSpecialized Freight (except Used Goods) Trucking, Local — 36% DemocraticOther Support Activities for Water Transportation — 42% DemocraticAll Other Pipeline Transportation — 28% DemocraticInland Water Passenger Transportation — 62% DemocraticMixed Mode Transit Systems — 66% DemocraticCommuter Rail Systems — 75% DemocraticCharter Bus Industry — 59% DemocraticScenic and Sightseeing Transportation, Other — 62% DemocraticLimousine Service — 69% DemocraticShort Line Railroads — 61% DemocraticScenic and Sightseeing Transportation, Water — 80% DemocraticCoastal and Great Lakes Freight Transportation — 65% DemocraticOther Urban Transit Systems — 51% DemocraticPort and Harbor Operations — 65% Democratic0%25%50%75%100%
Each dot is one of the 47 other industries in Transportation and Warehousing; size scales by workforce. Hover to see names — click to jump.

How this is measured

VRscores estimate the partisan composition of an industry by linking voter registration records to employment profiles, then aggregating workers up the NAICS hierarchy. The two-party shares above exclude workers with no major-party affiliation.

Read the full methodology or the published Organization Science paper.

Top employers in Transportation and Warehousing

Other industries in Transportation and Warehousing

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Citation

Kagan, Max; Frake, Justin; Hurst, Reuben (2026). “VRscores: A New Measure and Data Set of Workforce Politics Using Voter Registrations.” Organization Science, 37(2), 444–465.
https://doi.org/10.1287/orsc.2025.20402