President Barack Obama will use an address to the nation on Thursday to unveil controversial plans to reform the immigration system through executive action, a move that could shield as many as five million undocumented migrants from the threat of deportation, reports The Guardian.

The president will outline his long-anticipated plans during televised remarks, shortly after 7 p.m. CST, before signing the action into force.

“Everybody agrees that our immigration system is broken,” Obama said in a video posted on Facebook on Wednesday in which he previewed his address.

White House officials said Obama planned to use executive authorities to combine increased resources for border security with a decree that significantly expands the pool of undocumented migrants who are temporarily protected from deportation and eligible for government work permits.