WASHINGTON — An executive order signed by President Donald Trump attempting to deny birthright citizenship to the children of immigrants who are born in the United States is likely to face immediate legal challenges — but, if enacted, could have dramatic consequences in places like South Florida.

President Donald Trump began his term by taking a series of sweeping immigration executive actions Monday that included declaring a national emergency at the US southern border, immediately ending use of a border app called CBP One that had allowed migrants to legally enter the United States,