This seems to be a modern trend.
In 2014 Scotland voted to remain part of the Union and rejected Scottish independence.
The SNP does not seem to have accepted the result though, campaigning relentlessly for another vote because they didn't like the result of the first one.
Similarly with Brexit. In June 2016 Remain lost narrowly, but their are certain politicians in the UK who have never accepted the result and are now saying they will lead a campaign to rejoin the EU.
Donald Trump was elected President of the USa in Nov 2016. Certain Democrats and most of the US media never accepted the result, claiming that "the Russians" had hijacked the election. Nancy Pelosi tweeted "Our election was hijacked. There is no question",even though such evidence was never produced. They also impeached Trump, failed with that and will now try and impeach him again.
And now we have Trump himself refusing to accept the result of an election, claiming to have been "stolen out", even though he can find no evidence to back up his claims.
So where does that leave us, when the people at the top of politics are refusing to accept the results of a vote when it goes against them?