WASHINGTON (AP) — Red, white and blue balloons rained down over crystal chandeliers in the soaring atrium of the Trump International Hotel at midnight Friday — "a new inaugural tradition," its social media account promised. [...] while President Donald Trump's hotel in Washington did serve as a hub of inaugural activities, it also stands as ground zero for what top Democrats and some ethics advisers see as his unique web of conflicts of interest. Trump's lease with the federal government to develop and operate a hotel inside the historic Old Post Office building expressly prohibits any elected official from benefiting from the property, yet Trump has not divested from his company or this particular project. Trump handed control of his international real estate development, property management and licensing company to his two adult sons. To help ease the appearance of conflicts of interest, the company said it would not enter into any new international deals, promised to hire a compliance officer and ethics adviser to vet domestic deals, donate foreign profit from its hotels and refrain from doing anything that could be perceived as exploiting the office of the presidency. "The Trump Organization has directed that no communications of the organization, including social media accounts, will reference or otherwise be tied to President-elect Trump's role as president of the United States or the office of the presidency," a company attorney wrote in a briefing released earlier this month. [...] Richard Painter, chief ethics lawyer under former President George W.