Linda Lovelace For President (1975, Linda Lovelace)
An optimistic title (although after the 2016 election who knows?) for a rather pointless movie intended to cash in on porn star Lovelace's notoriety.
There's an early urban view of a number of GM New Look 'Fishbowls:
Our heroine tours the country drumming up support with a motley retinue in two Dodge S-series buses. Some of the time she keeps her clothes on: