Peter Overby As NPR's correspondent covering campaign finance and lobbying, Peter Overby totes around a business card that reads Power, Money & Influence Correspondent. Some of his lobbyist sources call it the best job title in Washington.

Donald Trump has made hats embroidered with the phrase "Make America Great Again" — an icon of his campaign and frequent giveaway item during his rallies. Robyn Beck/AFP/Getty Images hide caption

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Robyn Beck/AFP/Getty Images

Donald Trump Spent Nearly $1 Million To Get Voters To Wear This Hat

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For Presidential Campaigns, Frugality Is All The Rage

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Republican presidential candidate and former Florida Gov. Jeb Bush speaks in Mt. Pleasant, S.C., in September. On Thursday, his campaign announced it had raised over $13 million in the third quarter of 2015. Mic Smith/AP hide caption

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Mic Smith/AP

A volunteer with the Koch-funded Libre Initiative directs people in 2014 as groceries are distributed at a food bank it partially sponsors in San Antonio. Eric Gay/AP hide caption

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Eric Gay/AP

Koch Political Network Takes A Deep Dive Into Community Organizing

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Warren Buffet is a supporter of Hillary Clinton, seen here campaigning with her in 2007. His company, Berkshire Hathaway, received low marks for transparency around its political spending. Paul Sakuma/Associated Press hide caption

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Paul Sakuma/Associated Press

Rick Perry ended his presidential campaign Sept. 11, but there was $13 million left in the bank of a superPAC supporting him. The superPAC says it's given donors their money back. Scott Olson/Getty Images hide caption

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Scott Olson/Getty Images

Israeli Prime Minister Benjamin Netanyahu addresses the American Israel Public Affairs Committee policy conference in Washington on March 2. Netanyahu also addressed Congress at the invitation of Republicans, who were strongly allied with AIPAC in fighting the nuclear agreement. Nicholas Kamm/AFP/Getty Images hide caption

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Nicholas Kamm/AFP/Getty Images

After Iran Deal Defeat, How Do Pro-Israel Lobbyists Regain Clout?

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AIPAC Walks Bipartisan Line While Israeli Politics Moves Sharply Right

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Ohio Gov. John Kasich's supporters have spent more on TV ads than any other presidential candidate, despite a late entry into the race. New Day For America/YouTube hide caption

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New Day For America/YouTube

In Turnabout, Candidates With Less Spend More, Candidates With More Spend Less

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