Story highlights Donald Trump has directed nearly one-fifth of his campaign cash to companies part of his vast business empire

That spending has created fodder for Hillary Clinton

Washington (CNN) Donald Trump has directed nearly one-fifth of his campaign cash to companies that are part of his vast business empire, new federal records show.

Trump, hurting for cash after he suddenly stopped self-funding his campaign last month, has mixed his public campaign and his private ventures for nearly the entire 2016 race. He has promoted Trump products at campaign events, publicly litigated a federal civil suit he's facing over Trump University on talk shows, and, this week, will bring the political press to Scotland for a tour of a Trump golf course.

And it shows in his latest campaign finance report, filed Monday: Trump-linked businesses account for 17% of all campaign expenses to date. He's paid almost $11 million to Trump organizations since launching his campaign a year ago.

The setup shows how unusual Trump's campaign is -- presidential candidates generally don't own buildings or resorts in multiple states or companies that could be used as contractors.

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