From the AP report on this (https://apnews.com/0336437987fec77627c17ca9a4c781bc)

> Trump acknowledged that he was made aware of the issue after seeing a television ad produced by U.S. Tech Workers, a nonprofit that wants to limit visas given to foreign technology workers, that aired in prime time on Fox News.

It does seem truly scary that by far the easiest way to get the US president to do something is to put an ad on Fox News. If you can package your cause into one of his pet topics, you have a good chance of something getting done. A US president that is so easily manipulated is terrifying.