Orlando has been asked to submit a formal bid to host the 2016 Democratic National Convention, according to a CNN.com report.

The event could cost the city as much as $60 million, but the payout could be triple the investment -- or more, the report states.

The Democratic National Committee's official request for proposal, also known as an RFP, was sent to 15 cities late Monday, and they are required to submit their bids to host the convention by June 6.

Cities that received the DNC's RFP are Atlanta, Chicago, Cleveland, Columbus (Ohio), Detroit, Indianapolis, Las Vegas, Miami, Nashville, New York, Orlando, Philadelphia, Phoenix, Pittsburgh and Salt Lake City.

The DNC will choose its 2016 host city by the close of 2014 or beginning of 2015, and Democrats are expected to hold the convention, where the party will officially choose its presidential nominee, in late summer 2016.

In a letter accompanying the RFP, DNC Chair Debbie Wasserman Schultz noted that Democrats, in addition to logistical requirements, will consider a city's relationship with a key political constituency, labor, as well as a city's approach and handling of certain issues.

Earlier this month, Republicans narrowed their list of potential host cities to six: Cincinnati, Cleveland, Dallas, Denver, Kansas City and Las Vegas. The Republican National Committee is likely to hold its nominating contest in early-mid-summer 2016, CNN's report states.