DeVos' financial interest in a company that targets kids with neurological disorders, while overseeing accountability, creates a conflict of interest.
The prolific dark money donor did not mention contributions to political nonprofits on its latest disclosure.
The Presidency of the Republic of Turkey Investment Office is sponsoring the 37th Annual Conference on U.S.-Turkey Relations, at Trump's DC hotel this week.
Ballard Partners has a longstanding relationship with Trump that attracts a high-profile companies and foreign leaders, and their clients spend heavily at Trump properties.
After attending and hosting three events at Trump properties in 2017, Pence hosted three times as many in 2018, and the profits went to the president.