New York Attorney General Letitia James on Monday revealed her office was conducting an investigation of President Donald Trump's business dealings in real estate and had issued a subpoena to the president's son, Eric Trump. 

James, a Democrat in her first term, said her office on Friday began a legal proceeding to compel testimony and have documents related to the case be turned over. 

Eric Trump, the vice president of the Trump Organization, has not complied with a subpoena in the investigation, James's office said. 

“Nothing will stop us from following the facts and the law, wherever they may lead. For months, the Trump Organization has made baseless claims in an effort to shield evidence from a lawful investigation into its financial dealings,” she said in a statement. 

“They have stalled, withheld documents, and instructed witnesses, including Eric Trump, to refuse to answer questions under oath. That’s why we've filed a motion to compel the Trump Organization to comply with our office’s lawful subpoenas for documents and testimony. These questions will be answered and the truth will be uncovered, because no one is above the law.”

James, who has sued the Trump administrtion on a variety of policy concerns ranging from the environment to immigration, said in a statement an investigation was opened into the president and the Trump Organization last year. 

The probe began after Michael Cohen, the president's former personal attorney, testified to Congress that Trump had inflated the values of his assets to obtain better terms for loans. 

The investigation was revealed as Republicans gather in Charlotte for the first day of the Republican National Convention, renominating Trump for a second term earlier today.

The attorney general's office is investigating several Trump properties, including the Seven Springs Estate in Westchester, 40 Wall Street in lower Manhattan, the Trump International Hotel and Tower Chicago and Trump National Golf Club in Los Anegels. 

In addition to issuing a subpoena to Eric Trump, the attorney general's office has also sent one to a land-use attorney who has worked with the Trump Organization. 

That attorney has not sufficiently answered the attorney general's subpoenas.