President Barack Obama is planning an election-night rally in his hometown of Chicago at the giant McCormick Place convention centre.
From there, supporters will await the election results and prepare for a moment of celebration - or dejection.
A person familiar with the plans said the decision is subject to change because no contract has yet been signed.
Mr Obama held an outdoor Election Day rally in 2008 in Chicago's Grant Park that attracted more than 200,000 people.
The convention centre cannot support a crowd of that size.