In the past decade, billionaires have been more empowered than ever before to spend money to influence American elections.

The 20 most prolific donors on the Forbes billionaires list have collectively given nearly$5 billion between 2015 and 2024, spending on everything from state ballot measures to congressional elections and presidential races. Somehave concentrated on supporting issues of interest. Finance billionaire Jeff Yass has poured millions into supporting pro-school-choice candidates in his home state of Pennsylvania and across the country.

While some billionaires have given similar amounts to both parties, the most prolific donors gave almost exclusively to one party. In federal races, LinkedIn co-founder Reid Hoffman gave just under 90 percent of his total donations to Democr

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