How does transfer reliance relate to voting patterns?

County vote margins are broken down into 5% bins across the range of the data. Bins to the right of 0 are counties won by Trump. Counties to the left were won by Harris. The transfer share of personal income is calculated as the population weighted averaged across all of the counties in that bin.

Due to recent budget constraints, the Bureau of Economic Analysis no longer published CAINC35, which includes a more detailed breakout of personal current transfer receipts at the county level. As such, this figure is limited to personal current transfer receipts rather than strictly government transfer receipts.
Source: Bureau of Economic Analysis
Economic Innovation Group