Newsom proposes national billionaires’ tax after backing California fight

Gavin Newsom is calling for a national billionaires’ tax just as he moved against California’s own wealth-tax drive, a contrast that puts his economic message and political ambitions in the same frame. In a Substack essay posted June 26, 2026, Newsom said, “I’m voting no” on the California initiative even as he proposed a federal minimum tax on people with net worth above $100 million.

The split is not cosmetic. California’s ballot measure would impose a one-time 5% tax on billionaires to help fund state healthcare programs, while Newsom’s federal pitch would rewrite the tax code at the national level and target a much broader group of ultra-wealthy households. He also called for closing loopholes that allow wealthy Americans to borrow against stock portfolios and pay little or no tax on those loans, a practice that has become central to the way many billionaires finance their lifestyles without selling shares.

Newsom cast the proposal as part of what he called an “economic reset for America,” tying the tax argument to the broader politics of inequality. He has also recently argued that the artificial intelligence boom is minting new billionaires while workers absorb the costs, and he paired the tax push with a call for the U.S. government to take a public stake in AI companies. That blends redistribution, industrial policy and a sharper critique of Silicon Valley’s wealth creation into one national pitch.

The timing is politically loaded in California, where the wealth-tax fight is already on the November 3, 2026 ballot after surviving an effort to block it. Backers and opponents are spending heavily, with Building a Better California raising more than $118 million, including $80 million from Google co-founder Sergey Brin, to support committees opposing the tax initiative through two competing ballot measures. The campaign has split labor allies, Silicon Valley billionaires and Newsom’s own political orbit, turning the state fight into a proxy battle over the Democratic Party’s economic message.

That makes Newsom’s federal proposal harder to read as simple policy evolution. His public break with the California measure suggests a substantive difference in design and scope, but it also comes as he is widely viewed as weighing a 2028 presidential run. The California governor is now arguing against a state-level tax on billionaires while elevating a national version of the same politics, a move that keeps him aligned with populist frustration at wealth concentration while leaving open the question of whether he is governing, positioning, or building a presidential brand.