According to an FCA spokesman, FCA US tripled its sales to government fleets in May, explaining part of an increase in overall fleet sales from 18% in May 2015 to 26% last month.

fleet vans - ProMaster City

Government fleet sales in May were led by the Ram 1500 and  ProMaster, the Dodge Charger (heavily used by the police), Dodge Grand Caravan, and Chrysler 200.

The United States Postal Service has been buying Dodge minivans for some years now, and several Allpar members have reported seeing fleets of new ProMasters in use by the USPS as well.