Kamala Harris and Donald Trump are set to square off in their first presidential debate next month, but the campaigns are still warring over logistics - namely relating to the microphones. Trump's campaign is pushing for the microphones to be muted when it is the other person's turn to speak. This is a rule that was originally requested by Joe Biden when he was the Democratic candidate. Trump's team ultimately agreed to the request - which was an apparent effort by Biden's campaign to limit interruptions. The Harris campaign wants to shift the agreed rules with just two weeks to go so that both candidates' microphones will be unmuted for the entire debate. Subscribe here: http://bit.ly/1rbfUog For more news, analysis and features visit: www.bbc.com/news #US #Election #BBCNews