Two weeks before his inauguration, Donald J. Trump was shown highly classified intelligence indicating that President Vladimir V. Putin of Russia had personally ordered complex cyber attacks to sway the 2016 American election.
The evidence included texts and emails from Russian military officers and information gleaned from a top-secret source close to Mr. Putin, who had described to the C.I.A. how the Kremlin decided to execute its campaign of hacking and disinformation.
Mr. Trump sounded grudgingly convinced, according to several people who attended the intelligence briefing. But ever since, Mr. Trump has tried to cloud the very clear findings that he received on Jan. 6, 2017, which his own intelligence leaders have unanimously endorsed.
The shifting narrative underscores the degree to which Mr. Trump regularly picks and chooses intelligence to suit his political purposes. That has never been more clear than this week.
On Monday, standing next to the Russian president in Helsinki, Finland, Mr. Trump said he accepted Mr. Putin’s denial of Russian election intrusions. By Tuesday, faced with a bipartisan political outcry, Mr. Trump sought to walk back his words and sided with his intelligence agencies.
On Wednesday, when a reporter asked, “Is Russia still targeting the U.S.?” Mr. Trump shot back, “No” — directly contradicting statements made only days earlier by his director of national intelligence, Dan Coats, who was sitting a few chairs away in the Cabinet Room. (The White House later said he was responding to a different question.)