Washington state's attorney general promised Monday he would fight for Deferred Action for Childhood Arrivals program beneficiaries to the fullest extent of the law, and joined New York Democrats by vowing to sue President Trump if he repeals the Obama-era program.

"If President Trump follows through on his reported decision to cancel DACA after a six-month delay, the Washington Attorney General's Office will file suit to halt this cruel and illegal policy and defend DACA recipients," Washington state Attorney General Bob Ferguson wrote in a statement. "We have been working closely with legal teams around the country, and we expect to be joined by other states in this action."

Ferguson added he would "use all the legal tools" at his disposal to advocate for "the thousands of dreamers" in his Pacific northwest state.

Ferguson wrote a letter to Trump in July, along with 19 other attorneys general, urging him to retain the DACA initiative.

On Monday, New York Attorney General Eric Schneiderman and Gov. Andrew Cuomo announced their state will sue Trump if he ends the Obama-era program that offers temporary legal status to illegal immigrants who came to the U.S. as minors.