WASHINGTON FREE BEACON -- Scrutiny of that spending has largely focused on pricey private jet travel and six- and seven-figure payments for interviews to friendly outlets like Al Sharpton's National Action Network and Oprah’s Harpo Productions. 

But the lion's share of the campaign's spending didn't go there. It went to well-connected media consulting firms, four of which raked in nearly $600 million, according to a Free Beacon review of Federal Election Commission records. Those four firms, our Andrew Kerr reports, have "deep ties to the Democratic establishment." 

Here's a rundown: