This tactic of challenging the results of elections is a long time Communist tactic. It first appeared after the fall of the USSR and the first truly free elections in Eastern Europe. Any time the Communists lost they went to this tactic.
It goes like this:
Before the election accuse the other side of planning election fraud.
Commit election fraud while accusing the other side.
If that fails, demand a recount.
If that fails, continually declare that the government that was legally elected is a fraud and is illigitimate.
Repeat at next election cycle.
We saw this here with the 2000 election and again in 2004. It is a staple of the left so get used to it.