As the Supreme Court prepared to hear arguments Thursday on whether to allow President Donald Trump's restrictions on birthright citizenship to take effect, he falsely claimed on Truth Social that the United States is the only country that offers such a right.

The president, who posted on Truth Social that we're all "SUCKERS," seems to think he understands the United States Constitution better than the Supreme Court.

The U.S. Supreme Court heard oral arguments Thursday in a case that could upend long-standing precedent on who is guaranteed American citizenship under the Constitution.