House Speaker Nancy Pelosi, D-Calif., said President Trump’s plan to use a national emergency declaration to unilaterally provide federal funding for a border wall would set a precedent Republicans may come to regret.

Democrats, she said, could use it later to enact their own priorities, such as increasing gun control.

"Why don't you declare that a national emergency? I wish you would,” Pelosi during a press conference Thursday, noting it was the one-year anniversary of the high school shooting in Parkland, Fla., that killed 17 students and staff. “But a Democratic president can do that.”

Democrats may try to block Trump’s national emergency declaration in court. They may also pass a resolution stopping the move. Pelosi said Democrats are “reviewing our options,” depending on what, exactly, Trump says he is going to do.

Earlier Thursday, Senate Majority Leader Mitch McConnell, R-Ky., said Trump informed him he would sign a border security and spending measure that provides $1.375 billion of the $5.7 billion Trump is seeking for structural barriers along the southern border. McConnell said Trump would declare a national emergency to acquire more funding beyond what is in the legislation.

“Republicans should have some dismay about the door they are opening,” Pelosi said.