Donald Trump has denied claims made by his staff that he eavesdropped on telephone conversations at his Palm Beach resort by installing a switchboard in his bedroom.

Six former workers claimed that he had a telephone console in his Mar-a-Lago room that could connected to 'every phone extension on the estate' and that he used to listen in to conversations.

But Trump's spokeswoman Hope Hicks told BuzzFeed: 'This is totally and completely untrue.'

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Donald Trump has denied claims made by his staff that he eavesdropped on telephone conversations at his Palm Beach resort by installing a switchboard in his bedroom

But Trump's spokeswoman Hope Hicks told BuzzFeed: 'This is totally and completely untrue.' Pictured: Mar-a-Lago

Six former workers claimed that he had a telephone console in his Mar-a-Lago room that could connected to 'every phone extension on the estate' and that he used to listen in to conversations. Pictured: A bedroom at the Palm Beach resort

Managing director of Mar-a-Lago, Bernd Lembcke said: 'I have no knowledge of what you wrote.'

While Trump runs the Palm Beach resort for guests and celebrities, he also has an apartment set aside for personal use.

Four employees who spoke to BuzzFeed anonymously said that Trump listened in on phone calls at the club during the mid-2000s but didn't know if this had continued any later.

One source who spoke to the site explained that it was clear when Trump was listening in because a light would go on that indicated his extension had joined the conversation and added that it was acknowledged that there was a likelihood of him listening in to calls when he was on site.

Another said that Trump 'could pick up the phone in the bedroom and listen to any conversation that was going on.'

But John Velez, the former Mar-a-Lago director of security said he just used the line to as a switchboard to dial out.

While billionaire businessman's former butler and former security director for Mar-a-Logo said that the console 'merely made it easier for him to call other rooms in the estate'.

While Trump (pictured with son Baron and wife Melania) he runs the Palm Beach resort for guests and celebrities, he also has an apartment set aside for personal use

Trump's campaign staff members are also increasingly concerned that the Trump Tower offices may be bugged, reported the New York Times

And it is not the first time claims of duplicity have been made against the presumptive Republican nominee.

The New York Times reported last month that campaign staff members were increasingly concerned that the Trump Tower offices may be bugged.

Meanwhile, Trump continues his campaigning across the country and has taken on a more moderate approach.

Senate Majority Leader Mitch McConnell said Trump has 'made a lot of progress toward passing what I would consider sort of the credibility threshold that you need to pass in order to be considered for the most important political job in the country.'

But while the US presidential battle is too close to call, one element is clear: Americans have soured on candidates Hillary Clinton and Donald Trump, a poll released Wednesday showed.

Respondents to the latest Quinnipiac University national poll put Clinton ahead of Trump just 42 percent to 40 percent, a narrowing from Clinton's four-point margin in the organization's June 1 survey.

It is also considerably closer than the 12-point Clinton advantage in an ABC News/Washington Post poll published Sunday which highlighted Clinton capitalizing on Trump's recent mis-steps.

It has been a tumultuous few weeks for Trump, a political novice who recently fired his campaign manager and faced criticism for having a paltry $1.3 million war chest at the end of May.