Top Republican Party figures, including President Donald Trump, were angered by the Supreme Court's decision that rejected the executive order blocking birthright citizenship for children of undocumented immigrants.

The president's first reaction was to demand that the Republican majority in Congress modify the Fourteenth Amendment to the US Constitution.

"Congress should begin working to end birthright citizenship TODAY! You will have my full and unconditional support," Trump wrote in Truth Social.

However, even with the “unconditional support” of the president, the Republicans would have an almost impossible path, since for a constitutional reform Congress requires a supermajority to achieve it. That is, at least 290 votes in the House of Representatives and 67 votes in the Senate, in addition to 38 states.

The Speaker of the House of Representatives, Mike Johnson (Lousiana), even stated that the Supreme Court's decision “endangers” US national security.

"Today's ruling is contrary to the rule of law and endangers our national security. Our country should not be forced to allow illegal immigration to the United States for the sole purpose of obtaining citizenship," he said.

Vice President J.D. Vance called the decision a “serious mistake.”

"This was a very disappointing ruling by the Supreme Court. We respect it, but we also believe it was a huge mistake," he said on Fox News with Laura Ingraham. “One of the consequences, Laura, is that people come here, literally on vacation, give birth, and suddenly the child and their family enjoy all the benefits of American citizenship.”

The Supreme Court, by a 6-3 vote Tuesday, struck down President Trump's executive order that restricted birthright citizenship for children of undocumented immigrants, as well as tourists and other travelers or casual workers.

What does the Supreme Court opinion say?

The opinion was written by Supreme Court Chief Justice John Roberts, who was supported by Trump-appointed Justice Amy Coney Barrett.

In his opinion, Justice Roberts invokes the history of the Fourteenth Amendment, passed after the Civil War to resolve the citizenship of former slaves born in the United States and later freed.

"Citizenship, then and now, was the right to have rights: to participate freely in our political community. The framers of the Fourteenth Amendment extended that promise to 'every person born free in this land,'" Roberts wrote. “We keep that promise today”

Justice Brett Kavanaugh voted against President Trump's executive order, but dissented in other aspects of the chief justice's opinion.

Another critic of the Supreme Court's decision was Stephen Miller, White House deputy chief of staff, and President Trump's main immigration advisor.

"It is one of the most destructive and outrageous decisions in the long history of the Supreme Court," Stephen Miller in