So far, the White House has minimized the nature of the warning former acting Attorney General Sally Yates provided about Mike Flynn’s potential vulnerability to blackmail from Russia.

CNN is now reporting her warning was much more emphatic.

Washington (CNN)Former Acting Attorney General Sally Yates is prepared to testify before a Senate panel next week that she gave a forceful warning to the White House regarding then-National Security Advisor Michael Flynn nearly three weeks before he was fired, contradicting the administration's version of events, sources familiar with her account tell CNN.

In a private meeting January 26, Yates told White House Counsel Don McGahn that Flynn was lying when he denied in public and private that he had discussed US sanctions on Russia in conversations with Russian Ambassador to the US Sergei Kislyak. Flynn's misleading comments, Yates said, made him potentially vulnerable to being compromised by Russia, according to sources familiar with her version of events. She expressed "serious concerns" to McGahn, making it clear -- without making a recommendation -- that Flynn could be fired. ...
On February 14, the day after Flynn's firing, White House press secretary Sean Spicer told reporters that Yates had simply "wanted to give a 'heads up' to us on some comments that may have seemed in conflict with what he (Flynn) had sent the Vice President."

Why did it take the White House 17 days to fire Flynn after this warning?

CNN notes that due to national security constraints, we may not hear the full story.

Drip, drip, drip.