WASHINGTON — Attorney General Jeff Sessions recently told the White House he might have to leave his job if President Trump fired his deputy, Rod Rosenstein, who oversees the investigation into Russian interference in the 2016 election, according to people familiar with the exchange.

Sessions made his position known in a phone call to White House counsel Donald McGahn last weekend, as Trump’s fury at Rosenstein peaked after the deputy attorney general approved the FBI’s raid April 9 on the president’s personal attorney Michael Cohen.

Sessions’ message to the White House, which has not previously been reported, underscores the political firestorm that Trump would invite should he attempt to remove the deputy attorney general. While Trump also has railed against Sessions at times, the protest resignation of an attorney general – which would be likely to incite other departures within the administration – would create a moment of profound crisis for the White House.

In the phone call with McGahn, Sessions wanted details of a meeting Trump and Rosenstein held at the White House on April 12, according to a person with knowledge of the call. Sessions expressed relief to learn that their meeting was largely cordial.

Another person familiar with the exchange said Sessions did not intend to threaten the White House but rather wanted to convey the untenable position that Rosenstein’s firing would put him in.

A Justice Department spokesperson declined to comment.

Rosenstein’s status remains uncertain, but the pressure he is facing seemed to subside after last week.