That is not true. People who have no idea what they are talking about are why I have to remind myself not to engage on threads involving legal issues. If you have a case cite of a Supreme Court decision that gives the 7 billion people of the world US Constitutional rights, I would be happy to review it and see if it says what you claim it says.
Well... people who result to ad hominems when they run out of arguments probably shouldn't engage in threads, legal or otherwise.
It couldn't possibly be simpler. The Constitution limits the President's powers. Immigrants have the right to petition the US courts when they have a dispute with the US government. One of the arguments they can make is that the President has exceeded his authority.