Apple CEO Tim Cook reiterated his support for undocumented young people who were brought to the U.S. when they were children, tweeting on Sunday morning that he stood with his 250 colleagues who are so-called “Dreamers.”

Reports surfaced over the weekend indicating that President Donald Trump was planning to announce his decision to terminate the Deferred Action for Childhood Arrivals program, or DACA, an Obama-era program that protects Dreamers from deportation and grants them temporary work permits and driver’s licenses.

Cook, who earlier in the week joined business leaders in sending a letter to Trump urging him to preserve DACA, re-emphasized his support on Twitter.

250 of my Apple coworkers are #Dreamers. I stand with them. They deserve our respect as equals and a solution rooted in American values. — Tim Cook (@tim_cook) September 3, 2017

Later on Sunday, Politico and Reuters reported that Trump plans to end DACA with a six-month delay on enforcement. If that happens, Congress could pass legislation and provide a more permanent solution for the nearly 800,000 people DACA currently protects.

Trump is expected to announce his decision on Tuesday.