The onslaught of hurricane Sandy has forced Barack Obama and Mitt Romney to suspend campaigning for at least 48 hours – time both teams desperately needed in the crucial final stretch to election day next week.
The two presidential candidates cancelled all scheduled events until at least midnight on Tuesday but there could be further disruption for much of the rest of the week, with flooding and power blackouts also taking their toll on the campaign teams' movements.
Early voting has already been suspended in some states – where the Obama campaign had hoped to make crucial gains before the election on 6 November.
Each team headquarters sent out instructions to switch from campaigning if need be to help the rescue services and told volunteers in affected areas to stay at home. The advice even included small practical points, such as the Romney team advising supporters to remove any election placards that could become flying projectiles in the storm.
The impact on the respective campaigns is unpredictable.
David Axelrod, Obama's campaign manager, told reporters: "In terms of the logistics, we are obviously going to lose a bunch of campaign time; this is as it has to be and we will try to make it up on the back end.
Obama abandoned planned rallies in Florida on Monday morning and in Ohio in the afternoon in order to return to Washington after being told the storm was shaping up to be worse than expected and that if he delayed, they might have trouble getting back to the capital.
A plane full of journalists accompanying him on the campaign trail had to be left behind in Florida.
Asked later about the impact of the storm on the election campaign, the president presented himself as being above such things as consideration of how it would affect voting. "I am not worried at this point about the impact on the election. I'm worried about the impact on families, and I'm worried about the impact on our first responders. I'm worried about the impact on our economy and on transportation," Obama said.
"The election will take care of itself next week. Right now, our number one priority is to make sure that we are saving lives, that our search-and-rescue teams are going to be in place, that people are going to get the food, the water, the shelter that they need in case of emergency, and that we respond as quickly as possible to get the economy back on track."
Obama had to return to the White House to be seen to be on the spot, monitoring the storm and in regular contact with the emergency services. To have continued campaigning while millions of people faced the prospect of costly damage might have alienated voters.
Romney's campaign team reached the same conclusion. Having rescheduled campaigning to take him away from states on the storm path, such as Virginia, to Ohio, he too changed his mind and followed Obama in cancelling all events.
Romney realised it might appear callous to be seen standing in front of rallies in sunshine, while people on the east coast faced disruption and damage. His vice-presidential running mate, Paul Ryan, also scrapped campaign events.
Gail Gitcho, a Romney communications director, said: "Out of sensitivity for the millions of Americans in the path of hurricane Sandy, we are cancelling tonight's events with Governor Romney in Wisconsin and Congressman Ryan in Melbourne and Lakeland, Florida. We are also cancelling all events currently scheduled for both Governor Romney and Congressman Ryan on Tuesday.
"Governor Romney believes this is a time for the nation and its leaders to come together to focus on those Americans who are in harm's way."
Obama described the storm as "big and powerful" but took solace in the fact that the emergency services have had a few days to prepare.
Echoing the Romney campaign about America coming together in time of crisis, he said: "It's going to be a difficult storm. The great thing about America is when we go through tough times like this we all pull together. We look out for our friends. We look out for our neighbours. And we set aside whatever issues we may have otherwise to make sure that we respond appropriately and with swiftness. And that's exactly what I anticipate is going to happen here."
Obama said he had spoken to all the governors of the states in the path of the storm to make sure food and water and emergency generation would be available for the hardest-hit.
"The most important message that I have for the public right now is, please listen to what your state and local officials are saying. When they tell you to evacuate, you need to evacuate. Do not delay. Don't pause; don't question the instructions that are being given, because this is a serious storm and it could potentially have fatal consequences if people haven't acted quickly," he said.
He told the public to expect blackouts and warned that it might take time to get the power back on and transport restored.
Neither side has as yet attempted to make political capital out of the storm. Romney is potentially exposed after saying in a debate during the Republican primaries and caucuses that he favoured cutting the Federal Emergency Management Agency (Fema) to help reduce the deficit.
The Romney campaign stood by that assessment, saying it was not proposing to abolish Fema, only that decisions about emergency spending should rest primarily with states rather than with the federal government.
Ryan Williams, a Romney spokesman, said in a statement: "Governor Romney believes that states should be in charge of emergency management in responding to storms and other natural disasters in their jurisdictions.
"As the first responders, states are in the best position to aid affected individuals and communities, and to direct resources and assistance to where they are needed most. This includes help from the federal government and Fema."
With polls showing the two campaigns tied neck and neck, both Obama and Romney were initially reluctant to quit the campaign trail.
Obama, after rearranging his schedule, tried to squeeze in two events before the storm hit, flying to Florida on Sunday evening to be in position for a joint rally with former president Bill Clinton in Orlando on Monday morning. He stayed overnight in Florida, but his team advised him against going ahead with the rally, leaving Clinton to do it on his own.
