Mark Zuckerberg’s immigration reform group is ramping up its attacks on Donald Trump as the RNC gets under way

Mark Zuckerberg-backed FWD.us is escalating its attacks on Donald Trump’s immigration policies as the candidate prepares to accept the Republican party’s presidential nomination in Cleveland.

The immigration reform group launched a website, Trump365, that explores the human and economic toll of deporting an estimated 11 million people.

“It’s a big number,” said FWD.us president Todd Schulte. “We want to break it down so people understand this is going to hurt each and every one of us in America, whether they’ve ever met an undocumented immigrant or not.”

FWD.us cites estimates that the cost of such a mass deportation could reach $735 billion to $935 billion over the next 20 years (or about $11,442 per household). It argues that uprooting so many people would have disastrous consequences for the nation’s economy and cause labor shortages for specific industries, like construction.

Schulte said he hopes Trump365 will serve as a “messaging hub,” where supporters could find graphics to share on Twitter and Facebook, in an attempt to amplify the message.

Trump365 launched a day before FWD.us prepares Monday to release the results of a new poll of voters’ views on Trump’s immigration plan in three key presidential battleground states.

Update: FWD.us just released the results of a new bipartisan poll of 600 likely voters in Colorado, Florida and Nevada, which reveals that Trump’s immigration policies are extremely unpopular among independent voters.

Roughly two-thirds of Independents said they opposed his plans to round up and deport all immigrants living here illegally (67 percent), to revoke citizenship from U.S.-born children of undocumented immigrants (67 percent), to temporarily ban foreign-born Muslims from entering the U.S. (67 percent) and to build a wall across the Mexican border (65 percent).

Trump365 and the new survey are part of a campaign to counter anti-immigration rhetoric in the 2016 White House race, which included web videos that imagined the plight of people ripped out of their homes or jobs by a deportation force.

This article originally appeared on Recode.net.