CNN Tonight host Don Lemon lost his patience with conservative pundit Ben Ferguson when the latter kept straying from the topic of Donald Trump.

Ferguson was appearing on a panel with fellow political commentators Tara Setmayer and Bakari Sellers to discuss President Trump's recent interview with the New York Times.

However, Lemon interrupted Ferguson and cut to commercial break when he went off on a tangent about the Obama administration and Hillary Clinton's aide Huma Abedin.

Enough is enough: Don Lemon lost his patience with conservative pundit Ben Ferguson, far right, when the went off the topic of Donald Trump and on a tangent about the Obama years

Ferguson claimed that during the Obama years several people received 'special treatment' after making mistakes for which they would have been indicted for had they been Republicans.

He then brought up the Clinton and Abedin email scandal, at which point Lemon interrupted him asking in what way his point was relevant to the Donald Trump interview.

When the show returned after a commercial break, Lemon said he would be happy for Ferguson to make his point on the condition that he did not 'hijack the panel' and would stick to things that are relevant to the topic.

Leading man: Lemon was keen to stick to the right topic during CNN Tonight

'But I don't wanna hear about Benghazi, I don't want to hear about uranium, it has been litigated a million times.'

Ferguson accused him of not wanting to discuss Clinton because it did not fit his narrative, to which Lemon responded that it is irrelevant.

Ferguson then accused Lemon of letting Sellers speak because he agrees with him, to which Lemon fired back: 'No it is not because I agree with it all, it's because he is talking about things that are relevant, things that have to do with now!

'Not some bull from the past that has been litigated over and over and is not relevant anymore!

'Every time, someone goes; "Oh but her emails, oh but uranium!"'

He finished off by urging Ferguson and the other panelists to turn the conversation back to the Trump interview, 'instead of going back in time in a time machine and talking about something and someone who is not president anymore.'