Former Vice President Joe Biden campaigned Wednesday on a horrific photo of a migrant father and daughter who drowned in the Rio Grande river while trying to cross into the United States. “This image is gut-wrenching,” Biden wrote on Twitter. “The cruelty we’re seeing at our border is unconscionable.” Biden blamed their deaths on Trump administration border enforcement officials rather than the open border policies promulgated by Democrats. “History will judge how we respond to the Trump Administration’s treatment of immigrant families & children—we can’t be silent,” he wrote. “This isn’t who we are. This is not America.”