Billionaire investor and Facebook board member Peter Thiel has never shied away from contrarian ideas. He thinks kids should drop out of college to launch a startup. He's backed efforts to build floating cities in international waters.

But in the liberal bastion that is San Francisco, Thiel's latest move may be the most daring yet: Thiel is going to be a California delegate for Donald Trump.

On Monday, Trump filed his slate of delegates for California, and right there on the list for Trump's 12th Congressional District picks is Peter Thiel.

That Thiel would support any Republican candidate is not all that surprising. In 2012, he was a major backer for Ron Paul, and last summer, he donated $2 million to Carly Fiorina's Super PAC. In the techtopia of Silicon Valley, Thiel is certainly not alone in his libertarian beliefs.

And yet, Trump is a different kind of candidate. He has become a particularly divisive figure among tech elites, particularly for his stance on immigration. In recent years, tech leaders like Mark Zuckerberg have emerged as some of the most outspoken advocates and lobbyists for immigration reform. During Facebook's recent F8 conference, Zuckerberg alluded to Trump, saying, "I hear fearful voices calling for building walls. Instead of building walls, we can help people build bridges."

Trump has proposed other policies that would likely shock Silicon Valley's system, too, like his insistence that Apple start to manufacture its iPhones in the United States. Presumably, that would apply to other tech manufacturers, as well. And that goes without mentioning the many times Trump has said he's in favor of "closing that internet up" — whatever that means.

Thiel is a Facebook investor, but Zuckerberg likely won't be the only founder in Thiel's portfolio whose political leanings differ from his own.

Thiel may also find himself a lonely voice in the investment community. John Doerr of Kleiner Perkins is a well-known Hillary Clinton supporter. So is Laurene Powell Jobs, wife of the late Steve Jobs. And while Marc Andreessen has given to both Republicans and Democrats over the years, the night Trump effectively won the Republican nomination, he tweeted the following Clinton pledge:

Then there are Thiel's PayPal co-founders, Max Levchin and Elon Musk. Levchin has been an outspoken advocate for LGBT rights in recent years, and Musk has already donated to Clinton this cycle.

And yet, while these tech leaders grapple with who to support and whether to do it publicly, there’s a whole other conversation going on about the actual tech platforms Silicon Valley creates. As the rest of the country—particularly young voters—increasingly get their news from the very platforms these leaders run, it's raising tough questions about just how unbiased these platforms have to be.

Just this week, news reports began swirling about Facebook artificially suppressing conservative news on its trending news tabs. Republican National Committee chairman Reince Preibus quickly seized on that, launching a website that demands Facebook answer for this bias.

Having one Trump-supporting board member won’t wash this problem away for Facebook, but least where Thiel's concerned, it's clear where he stands.