The technology industry published an open letter about the U.S. election on Thursday, and it is vehemently opposed to Republican presidential nominee Donald Trump.

The letter, published on Medium, was signed by dozens of tech heavyweights, including Qualcomm Inc. QCOM, -0.38% Chairman Paul Jacobs, Tumblr CEO David Karp, Box Inc. BOX, -0.76% CEO Aaron Levie, eBay Inc. EBAY, -0.30% co-founder Pierre Omidyar, Reddit co-founder Alexis Ohanian, Yelp Inc. YELP, -3.89% CEO Jeremy Stoppelman, Facebook Inc. FB, -2.06% vice president Margaret Stewart, Apple Inc. AAPL, +0.03% co-founder Steve Wozniak, and a number of venture capitalists.

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The letter focuses on immigration, which is a hot topic for an industry that sources much of its top talent from India and Asia. Silicon Valley has long pushed for immigration reform through the H-1B visa, with Facebook CEO Mark Zuckerberg and Microsoft Corp. MSFT, -0.99% founder Bill Gates among the most outspoken executives on the issue.

“We believe in an inclusive country that fosters opportunity, creativity and a level playing field. Donald Trump does not,” the letter said. “His vision stands against the open exchange of ideas, free movement of people, and productive engagement with the outside world that is critical to our economy .”

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While the Trump campaign did not immediately respond to a request for comment, the candidate’s policies regarding immigration reform include raising wages paid to H-1Bs, so that companies have more incentive to hire American citizens, rather than relying on cheaper international labor. The candidate has also called for a wall to be built between Mexico and the United States, and a temporary ban on Muslims.

The letter also discusses education and the need for more infrastructure, education and scientific research in the U.S., which they believe lack in Trump’s policies.

While it makes no mention of any other candidate, including presumptive Democratic nominee Hillary Clinton, the tech sector has been outspoken about its support for Clinton before.

Tech groups, including the Consumer Technology Association, which puts on the world’s largest technology tradeshow, CES, every year in Las Vegas, have applauded Clinton’s technology agenda, which includes giving green cards to STEM masters and PhDs from accredited institutions and supporting visas that make it easier for international entrepreneurs to open shop in the U.S.

There is at least one major technologist in support of Trump, however.