The Democratic National Committee has asked New York and 14 other cities to make a pitch to host the presidential nominating convention in 2016.
A spokesman for Mayor de Blasio said New York "is enthusiastically assembling a proposal."
The DNC on Tuesday said the party will accept proposals through June 6 and will pick a host city either late this year or early in 2015.
In addition to New York and Chicago, the cities asked to submit bids include: Atlanta, Cleveland, Columbus, Detroit, Indianapolis, Las Vegas, Miami, Nashville, Orlando, Philadelphia, Phoenix, Pittsburgh and Salt Lake City.
New York hosted the Republicans' nominating convention in 2004.