"Of course there is a large scale voter fraud happening on and before election day. Why do Republican leaders deny what is going on? So naive!" the Republican presidential nominee said in a tweet.
Trump's allegation about voter fraud has been refuted by leaders of both the Republican and Democratic party.
Over the past few days the Republican presidential nominee has been alleging that there is a possibility of a large scale voter fraud.
"We have all got to come together and win this election. We can't have four more years of Obama (or worse!)," an undeterred Trump said on his tweet this morning.
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Trump has more than 12.5 million followers on tweeter.
Trump is trailing in behind his Democratic rival Hillary Clinton in general elections.
As per RealClearPolitics, which keeps tracks of all major national polls, Clinton is leading Trump by 5.5 percentage in average of major polls.