"Kill FISA, it was illegally used against me and many others. They spied on my campaign," Trump wrote.
According to the Federal Bureau of Investigation (FBI), the Reforming Intelligence and Securing America Act extends Section 702 of FISA for 5 years, which "permits the government to conduct targeted surveillance of foreign persons located outside the United States.” The database of foreign intelligence also includes information on US citizens who may have been communicating with people overseas.
Source:
The Post Millennial