U.S. President Donald Trump on Tuesday addressed the decision to rescind the Deferred Action for Childhood Arrivals (DACA) program, which protected approximately 800,000 illegal immigrants who arrived in the U.S. as minors from deportation.

“Congress now has 6 months to legalize DACA (something the Obama Administration was unable to do). If they can't, I will revisit this issue!” he tweeted.