The Koch brothers have been big contributors to Republican candidates and causes for many years, but the one candidate they've said they will not get behind is Donald Trump. There are plenty of other big spenders, however, ready to drop some dollars on Trump's presidential campaign. He's kicking off his fundraising efforts in Los Angeles Wednesday with an event hosted at the mansion of real estate billionaire, Tom Barrack. The cheapest ticket to attend costs $25,000. Insiders involved in the event have said they there will be some entertainment bigwigs in attendance, but many are reluctant to openly state their support of Trump in liberal Hollywood.