The former America's Got Talent judge is celebrating his one-year anniversary at CNN this week, marked by guests including Chelsea Handler, Rosie O'Donnell and former President Jimmy Carter.
Speaking in a video posted to the programme's website, he said: "I think we had an idea for the show that it would be longer format interviews, mainly celebrity driven and it's turned into much more of a news show.
"That was driven by the incredible news cycle we've had, and by the fact that my training and background is all news journalism."
Morgan added: "I think if you're on CNN, politics and news are always the two biggest drivers of what determines the editorial policy on the show. Although I love doing the interviews with big stars and so on, we want to get that balance right.
"When there is news we will do it very well and when there is no news we will do great interviews with big stars."
Morgan recently announced that he was leaving America's Got Talent to focus his attention on Piers Morgan Tonight. Howard Stern was later announced as his replacement.
"I've been a judge since the shows began six years ago," said Morgan. "I've loved every single second, but discovered that juggling - to my surprise - really is a bit more difficult than I thought, so I am going to focus on what will be a huge year at CNN with the upcoming election."
Piers Morgan Tonight airs weeknights at 9pm ET on CNN and at 8pm UK time on CNN.
Watch Piers Morgan talking about his first year at CNN below: