Learn English – What does the phrase “behind deadline” mean

The Mandela quote is in a different context i feel. “It is better to lead from behind and to put others in front, especially when you celebrate victory when nice things occur. You take the front line when there is danger. Then people will appreciate your leadership.” Mandela here is definitely saying that Leading from Behind means that the leader should step back when the group or organisation or nation is celebrating something and step in to the front only when there is need for him/her to lead from the front.

So if we refer to Mandela's quote, then what Obama's statement means is quite remarkable. It would mean that the US won't get involved in the Libya issue but will be there to take credit by staying behind the scenes if things get better.

Another way to look at it would be that it was a diplomatic sort of a response to the matter at hand. Obama washed all responsibility off his hands in a manner of speaking.

The question is too vague and I do not believe you will find any single word which will convey the message you are trying to convey. The closest would be: 'time-sensitive'. e.g. Do not worry about a quick submission for your project as it isn't time-sensitive.

Another case (yours): Please don’t feel rushed to RSVP as I have no time-sensitive registration/seating/deadline/requirement.