President Donald Trump has issued the first veto of his presidency, overruling Congress to protect his emergency declaration for border wall funding.
Flanked by law enforcement officials as well as the parents of children killed by people in the country illegally, Mr Trump maintained that he is not finished fighting for his signature campaign promise, which stands largely unfulfilled 18 months before voters decide whether to grant him another term.
A dozen defecting Republicans joined Senate Democrats in approving the joint resolution on Thursday, which capped a week of confrontation with the White House as both parties in Congress strained to exert their power in new ways.
Mr Trump wants to use the emergency order to divert billions of federal dollars earmarked for defence spending toward the southern border wall.
Those cases could block Mr Trump from diverting extra money to barrier construction for months or longer.
American Civil Liberties Union, which filed one of the cases, said the veto is meaningless, like the declaration in the first place.
“We look forward to seeing him in court and to the shellacking that he will receive at the hands of an independent judiciary,” said executive director Anthony Romero.
Mr Trump maintained that the situation on the southern border is “a tremendous national emergency”, adding, “our immigration system is stretched beyond the breaking point”.