But former intelligence officials say presidents are routinely informed about intelligence even when its not definitively confirmed.
Some questions and answers about how presidents are briefed on intelligence, what sort of information they receive and how this applies to the situation with Russia:HOW DO PRESIDENTS RECEIVE NATIONAL SECURITY INFORMATION?
The PDB, as it is known, is a compilation of intelligence and national security assessments from government analysts.
Theres no mathematical formula for deciding what gets briefed to the president, said David Priess, a former CIA intelligence briefer and author of The Presidents Book of Secrets: The Untold Story of Intelligence Briefings to Americas Presidents."
After news broke about the intelligence, Trump was briefed, the White House said.