What we know about federal law enforcement and intelligence agencies spying on the Donald Trump campaign likely represents but a sliver of their covert activities. But its about time we do, and President Trump is right to demand an investigation. Heres what we know so far. In the run-up to the presidential election, on July 31, 2016, the Federal Bureau of Investigation (FBI) opened a counterintelligence investigation to probe whether the Trump campaign was colluding with Russia to influence the election.