Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Washington (CNN) A billionaire backing Donald Trump is taking advertising into his own hands. Stephen Adams, a billboard magnate who made his fortune in a half-dozen different business ventures over the last five decades, is pouring hundreds of thousands of dollars into a pro-Trump campaign. Yet it is not the Trump campaign or a Trump super PAC that is spending over $650,000 to boost the Republican nominee -- it is Adams himself, who his buying his own billboards in a set of swing states. It is an unusual purchase and a throwback to a previous era when the wealthy had close to unfettered control over how their dollars were spent. Adams disclosed the spending this week in independent expenditure reports almost always filed by political action committees or nonprofits, rather than individuals: $150,000 in North Carolina, $200,000 in Pennsylvania and $300,000 in Michigan.Stephen Adams is spending over $650,00 to boost Donald Trump's campaignAdams is buying his own company's billboards in critical swing states to promote Trump 
 Question:If donated to a _ -- staffed by professional operatives and fundraisers -- Adams would instantly become one of Trump's top donors.

PAC