Then-acting Attorney General Sally Yates alerted the White House that Flynn may have discussed sanctions in a December phone call with Russian ambassador Sergey Kislyak on Jan. 26. But according to two unnamed sources cited by NBC, Pence did not know until Feb. 9.
The Washington Post reported the same day, citing nine unnamed current and former officials, that Flynn’s call had included a discussion of sanctions.
Before the Justice Department alerted the White House of its suspicions about Flynn, Pence had defended the now-resigned national security adviser against charges of wrongdoing.
Eighteen days elapsed between the White House first hearing those suspicions on the 26th, and Flynn’s resignation Monday.