FWD.us, an immigration reform group backed by Mark Zuckerberg, has been escalating its attacks on Donald Trump’s immigration policies as the GOP convention kicks off in Cleveland, Ohio, on Monday. The group launched a website, Trump365, that examines the human and economic toll of deporting an estimated 11 million people, Recode.com reported.

“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.”

The group estimates that a mass deportation could cost anywhere from $735 billion to $935 billion over the next 20 years.

Schulte hopes Trump365 will be a “messaging hub” where supporters can find graphics to share on social media and spread the message, according to Recode.com.

The website is part of a campaign to counter anti-immigration rhetoric in the 2016 race for the White House.

via Trump365
via Trump365