Groups that want a tougher approach to illegal immigration are worried that President Donald Trump will renege on one of his signature policy promises: ending the Deferred Action for Childhood Arrivals (DACA) executive amnesty program.

During the presidential campaign, Trump vowed to “immediately terminate” the DACA program, which former President Barack Obama created in 2012 to give illegal immigrants who entered the U.S. as minors a two-year period of deferred action on deportation and access to work permits.

Five months into his presidency, Trump has not moved to cancel DACA protections, and the Department of Homeland Security (DHS) announced earlier in June the policies would remain in place for an indefinite period of time. That inaction has convinced many immigration groups that the Trump administration has no intention of eliminating the program.