I hate recounts. I want revotes. For large elections, if the margin of difference is less then about 2-3 times the square root of the number of votes the leader has, they should revote.
Example, if the leader has 450,000 votes, the margin should be at least 1342 votes (2 times root N).
It won't occur often and one revote should be enough to get a decisive winner. It's just an acknowledgment that people make mistakes.