Billionaire Tom Steyer at a crossroad: Run for California governor or go after Trump?

Tom Steyer has some big decisions to make, and judging from his moves over the last few months, he’s keeping his options open.

In California, the billionaire Democratic donor became known for fighting climate change and tapping his bank account to attack politicians who denied it.

More recently, he helped fund a successful state ballot measure to raise cigarette taxes, warned at the California Democratic Party convention of the corrupting influence of corporate America, and released a policy paper on the state’s growing income inequality.

All about the money in the 2018 California governor’s race »