WASHINGTON — Former acting attorney general Sally Yates is expected to testify to Congress that she expressed alarm to the White House about President Donald Trump’s national security adviser’s contacts with the Russian ambassador, which could contradict how the administration has characterized her counsel.

Yates is expected to recount in detail on Monday her Jan. 26 conversation about Michael Flynn and to say that she saw discrepancies between the administration’s public statements on his contacts with ambassador Sergey Kislyak and what really transpired, according to a person familiar with that discussion and knowledgeable about Yates’s plans for her testimony.

Yates is expected to say that she told White House counsel Don McGahn that she was concerned Flynn’s communications with Kislyak could leave Flynn in a compromised position as a result of the contradictions between the public depictions of the calls and what intelligence officials knew to be true, the person said.

White House officials have said that Yates merely wanted to give them a “heads-up” about Flynn’s Russian contacts.