U.S. Senate Minority Leader Chuck Schumer told reporters on Monday he expects legal challenges to President Donald Trump’s national emergency declaration.

Schumer, was at an unrelated event in the Utica area, pointed to Republican lawmakers raising concerns with the declaration.

“I think it’s going to be a rough road to hoe for the president to win in court,” Schumer said.

Already, New York Attorney General Letitia James has signaled she will join a legal challenge after Trump failed to secure the $5 billion for a wall on country’s southern border with Mexico.

Schumer pointed to previous emergency declarations in times of war, in the aftermath of the Sept. 11 attacks and the Ebola outbreak.

“Something like this, which Congress debated and didn’t agree with the executive branch, is unprecedented,” he said.