The Clinton campaign and the Secret Service have said more than once that he's an agent

Conservatives have tried to tie him to her alleged health problems

The man has been seen at Clinton's side on several occasions

Hillary Clinton's 'mysterious handler' who pops up from time to time on the campaign trail is a Secret Service agent, her campaign says, and rumors that suggest otherwise are 'despicable.'

A right-wing website on Tuesday speculated that while the African-American man dressed like he was part of Clinton's government-provided security detail he may not be because 'his actions prove otherwise.'

The Drudge Report picked up the story that same day. It posted a picture of Clinton and the man at a Las Vegas rally and asked 'Who is he?'

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A right-wing website speculated that while the African-American man dressed like he was part of Clinton's government-provided security detail he may not be because 'his actions prove otherwise'

Clinton and the Secret Service are pictured above during a disturbance in the crowd at an August 4 rally at the International Brotherhood of Electrical Workers (IBEW) in Las Vegas, Nevada

The 'mysterious handler' who pops up from time to time on the campaign trail is a Secret Service agent, her campaign says, and rumors that suggest otherwise are 'despicable'

The agent in question is seen in the back left at the same rally in Las Vegas

The original post on The Gateway Pundit pointed to a rally in early August where Clinton was interrupted by animal rights activists and men in suits, presumably Secret Service agents, rushed the stage.

'You're OK. Keep talking. You handled it, we're not going anywhere,' the man in question told the Democratic presidential candidate.

The microphone picked up the pep talk, giving observers new insight into Clinton's relationship with the outfit sworn to protect her.

Conservatives began to question what the man's role was with the campaign - and insisted that he wasn't a Secret Service agent.

'Who is this man who follows Hillary? He's clearly not SS. Doctor, shrink? Or brainwasher?' tweeted documentarian Mike Cernovich.

Cernovich has also speculated that a photo of the man carrying a pen is suspicious and the item in his hand is actually 'Diazepam pen.'

Clinton's communications director debunked the conspiracy theory online in an a tweet on Aug. 16. 'That is a US Secret Service agent with a pen. Normal writing pen,' she wrote.

A spokeswoman for the Secret Service confirmed that the man was part of Clinton's security detail in an email to CNN that said, 'The item in the Detail Leader's hand is a flashlight.'

In his piece Tuesday, the 'Gateway Pundit' - Jim Hoft - revisited the controversy and claimed, 'An expert on Secret Service tactics told TGP Secret Service agents would not touch a candidate in the manner that this individual did and especially Hillary Clinton.'

Hoft also observed that the man's disappearances from the campaign trail were consistent with the candidate's slow down in campaigning and intimated that both could be related to her alleged health problems.

Clinton had two coughing fits on the campaign trail on Monday that she said were caused by seasonal allergies. She yesterday told reporters sitting in the press section of her campaign plane that she dosed herself with antihistamines and would be running at full speed by the end of the week.

Clinton's national press secretary confirmed on Twitter late Tuesday night that the unknown man is in fact a Secret Service agent.