Vice President Biden says President-elect Donald Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE hasn't done enough to address ethics concerns and conflict-of-interest issues connected to his business empire.

"I don't think he's done enough and he may sink in the swamp," Biden told NBC News's Andrea Mitchell on Thursday.

"If you don't drain it, you sink in it. Are you going to be president or are you going to be a businessman? You don't do both. You ran for the most coveted office in the world," Biden added.

During his presidential campaign, Trump vowed to "drain the swamp" of special interests, often using the phrase during campaign rallies and events.

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On Wednesday, the president-elect said he is handing control of his business empire to his two adult sons and placing his assets in a trust.

Ethics experts had urged the president-elect to sell all of his assets and place the proceeds in a blind trust, saying it was the only way to remove any possible conflicts between his business empire and his presidency.

But Trump said he wouldn't be selling his company. Instead, the president-elect is making a number of smaller changes designed to limit his involvement in its operations.

Trump attorney Sheri Dillon told reporters the company will not make new foreign deals and will appoint an ethics adviser who will be required to sign off on new domestic business agreements.

Biden on Thursday urged Trump to solely focus on being president.

"That's the job," Biden said.