Political advertising is banned from being broadcast on television or radio. Unless Facebook changes, it may be time to extend this prohibition to social media.
Trump will not be the first (in the event he reaches the White House and he delivers on his campaign promises) president to enact racist laws that place restrictions on immigrants of specific ethnic groups during his reign.
The Republican presidential candidate is a burden to his party in 2016 ... his opponent's advertisements will continue to target the best source of material for attacking Donald Trump: Donald Trump.