the acting chief executive of the clinton foundation acknowledged that the global philanthropy made mistakes in how it disclosed its donors amid growing scrutiny as hillary rodham clinton opens her presidential campaign .
the fund had been facing allegations of improper behavior after reports surfaced about undisclosed donations from foreign governments and a donor who was selling his uranium company to a russian state agency at the same time the state department had to approve the sale .
acting ceo of the clinton foundation apologized after hillary clinton 's presidential candidacy put it under intense scrutiny for undisclosed donations .