In the weeks after he became the Republican nominee on July 19, 2016, Donald Trump was warned that foreign adversaries, including Russia, would probably try to spy on and infiltrate his campaign, multiple government officials familiar with the matter told NBC News.
The warning came in the form of a high-level counterintelligence briefing by senior FBI officials, the officials said. A similar briefing was given to Hillary Clinton, they added. They said the briefings, which are commonly provided to presidential nominees, were designed to educate the candidates and their top aides about potential threats from foreign spies.
Trump was "briefed and warned" at the session about potential espionage threats from Russia, two former law enforcement officials familiar with the sessions told NBC News.
"That the Republican and Democrat nominee for president received a standardized briefing on counterintelligence is hardly a news story," said Raj Shah, a White House spokesman.
Still, the revelation that the Trump campaign was warned about spying threats from Russia and other adversaries, which has not been previously reported, casts a new light on the Trump campaign's dealings with Russians in the months before the November election.