President Obama being interviewed by ABC's George Stephanopoulos in the Oval Office. (Screenshot)

Although President-elect Donald Trump’s heavy use of Twitter “clearly worked” for him as a presidential candidate, President Obama says he warned Trump that that will change when he actually takes the Oath of Office on January 20th.

“I’ve said to him… that the day that he is the President of the United States, there are world capitals and financial markets and people all around the world who take really seriously what he says,” Obama said in response to a question about Trump’s Twitter habit during an interview Sunday on ABC’s This Week With George Stephanopoulos.

Here is a transcript of the exchange:

STEPHANOPOULOS: "You’re also not much of a tweeter. He [Trump] was on a tirade this morning, sent out a lot of tweets early this morning. Clearly, according to him and his people, he’s gonna keep on doing it when he’s sitting there behind that desk. "Good idea?" OBAMA: "On the one hand information is moving quick ...or the way in which people consume information is changing so fast. Clearly this worked for him, and it gives him a direct connection to a lot of the people that voted for him. "I’ve said to him, and I think others have said to him that the day that he is the President of the United States, there are world capitals and financial markets and people all around the world who take really seriously what he says, and in a way that’s just not true before you’re actually sworn in as president."

Trump is known for his prolific tweets, which he sometimes composes in the middle of the night.

For example, a tweet calling Meryl Streep “one of the most over-rated actresses in Hollywood” after she criticized him in her Sunday night Golden Globes speech was posted by Trump early Monday morning at 3:27 am.

Even some conservatives agree with Obama that tweeting from the Oval Office might not be such a good idea.

“What is refreshing in a candidate may be destabilizing in a president,” Kyle Sammin wrote in The Federalist. “For the good of the country, and for his own good, Trump should delete his account.”