Is Tom Steyer the progressive answer to the Koch brothers?

The former hedge fund manager wants to impeach Trump and is putting his money where his mouth is. It sounds like a leftwing dream … but is he plotting his own White House run?Tom Steyer is a billionaire from San Francisco who comes bearing tantalising gifts for American progressives.The first is a confetti of cash to fight elections and ballot measures across the country, a bounty to counter the Koch brothers’ funding of conservative candidates and causes and possibly set the US on