While USPS is not subject to "Buy America" requirements, like most quasi-governmental organizations it does have an acquisition policy of purchasing vehicles from US manufacturers rather than overseas when possible. This aligns with the general US system of preferential government purchasing, in which federal purchasing decisions are based partially on policy objectives such as promoting small businesses and US manufacturing. There could be some debate over this policy position, but at its core it could be viewed as a very light extension of New Deal principles---that the federal government should put its money where its mouth is by patronizing the types of US businesses that are the subject of so much political rhetoric.

To my knowledge, there are no right-hand-drive vehicles manufactured in the US, as RHD is limited to countries closer to extensive auto manufacturing in Europe and Asia. As a stopgap measure, the Postal Service has been making use of domestic minivans converted to RHD using a belt arrangement that does not look particularly user friendly. The driver has to lean over to see the dashboard instruments.