The watchdog group Citizens for Responsibility and Ethics filed a lawsuit Monday claiming that Trump is violating the Constitution by allowing his businesses to accept money from foreign governments.
The lawsuit alleges he's violating a clause that prevents the president from accepting money from diplomats. The group said this could apply to Trump when diplomats stay at his hotels or foreign governments rent offices from him, according to ABC News.
Two former White House ethics lawyers, Norman Eisen and Richard Painter, are leading the charge.
White House Director of Strategic Communications Hope Hicks argued Trump doesn't have any further conflicts of interest and referred to lawyer Sheri Dillon's statement from early January. Dillon previously said an ethics adviser would make sure the president's businesses do not present any conflicts of interest.
Trump resigns from positions in more than 400 businesses
President Donald Trump has resigned from his position in more than 400 business, according to a document CNN Money obtained from the Trump Organization.
"I, Donald J. Trump, hereby resign from each and every office and position I hold" the 19-page letter, which lists each of the business entities he's resigned from, notes.
The letter was signed by Trump on Jan. 19, the day before his inauguration.
WATCH | White House press secretary Sean Spicer told reporters Monday that Trump's sons are "fully in charge" of his company.
During a Jan. 11 press conference, Trump said he planned to transfer his business holdings to a trust that would be run by his sons, but refused to sell his ownership stake.
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The Associated Press contributed to this report.