According to Newsweek:
WASHINGTON (Reuters) – U.S. counterterrorism officials are looking at an emergency proposal on the legal steps needed to postpone the November presidential election in case of an attack by al Qaeda, Newsweek reported on Sunday.
Homeland Security Secretary Tom Ridge warned last week that Osama bin Laden’s al Qaeda network may attack within the United States to try to disrupt the election.
The magazine cited unnamed sources who told it that the Department of Homeland Security asked the Justice Department last week to review what legal steps would be needed to delay the election if an attack occurred on the day before or the day of the election.
This may be nothing more than prudent planning, but you ought to be aware that the possibility is being considered.