By Staff, Agencies 

Once again, Twitter has placed a disclaimer on Donald Trump's tweet criticizing the promotion of drop boxes by Democrats as an option for voters, saying the tweet violated the company's “civic and election integrity” rules.

Twitter, in a disclaimer attached to the tweet, said: “Twitter has determined that it may be in the public's interest for the tweet to remain accessible.”

Democrats across the country are promoting drop boxes as a convenient and reliable option for voters who do not want to entrust their ballots to the US Postal Service. Trump wrongly claimed they were a "voter security disaster".

The row came amid the announcement that Kellyanne Conway, the US president's chief advisor, would be abruptly leaving the White House at the end of August, and just two months before election day.