MENLO PARK, Calif. — It’s not easy being the first and only Fox News host in Silicon Valley.

But Steve Hilton, a tech entrepreneur who was once chief adviser to former Prime Minister David Cameron of Britain, added that role to his résumé in June.

Now every week, Mr. Hilton flies from the home he shares with his high-profile tech executive wife, Rachel Whetstone, in Silicon Valley’s billionaire enclave of Atherton, Calif., to Fox’s studios in Los Angeles to host “The Next Revolution With Steve Hilton.” Fox News markets the Sunday night program as exploring “the impact of the populist movement.”

All of which makes life complicated for Mr. Hilton in overwhelmingly liberal Silicon Valley, where supporters of President Trump are nearly nonexistent and few think populism would improve their lives.

He gets hassled for it. Recently, someone left novelty toilet paper with Mr. Trump’s face on it on Mr. Hilton’s desk at Crowdpac, the political fund-raising start-up he helped found in 2013. A vandal also took down the Trump campaign T-shirt that had been hanging on the office’s “bipartisan wall.”