Sen. Kamala Harris (D-Calif.) is calling for Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsTrump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status White House officials voted by show of hands on 2018 family separations: report MORE to resign over his role in former FBI Director James Comey’s firing.

“Frankly, I think Jeff Sessions should resign,” Harris said Thursday on CNN’s "The Lead."

“There is good reason to believe that he was not truthful when he testified before Congress,” Harris continued, mentioning Sessions' past meetings with Russian officials.

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“Then, in the last 48 hours, [it’s] that he would sign off on the firing of the person investigating the case he’s recused from.”

I stand by what I said back in March. Attorney General Jeff Sessions should resign. — Kamala Harris (@SenKamalaHarris) May 11, 2017

The California lawmaker is at least the second Democratic senator to call for Sessions to resign in the wake of Comey's firing this week, joining Sen. Ron Wyden Ronald (Ron) Lee WydenGOP senator blocks Schumer resolution aimed at Biden probe as tensions run high Republican Senators raise concerns over Oracle-TikTok deal Hillicon Valley: TikTok, Oracle seek Trump's approval as clock winds down | Hackers arrested for allegedly defacing U.S. websites after death of Iranian general | 400K people register to vote on Snapchat MORE (D-Ore.), who called for Sessions to resign on Wednesday.

Sessions said he’d recuse himself from anything to do with Russia. It’s clear he did not. Calling for him to resign (again). — Ron Wyden (@RonWyden) May 10, 2017

Harris argued that Sessions participating in Comey’s ouster would violate the former GOP senator's pledge to recuse himself from the Justice Department's probe of Russia's interference in the election.

“[It] calls into question his objectivity and his ability to keep his word when he has told the American public and Congress that he’ll recuse himself from being involved with a subject that he knows he has a conflict with.”

The White House on Tuesday announced that President Trump had fired Comey on the recommendation of Sessions and his deputy, Rod Rosenstein.

Comey's ouster was in the works since at least Monday, with Trump giving Sessions and Rosenstein a directive to provide a written explanation for firing Comey, The Washington Post reported. Sessions was purportedly asked to find justifications for Comey’s dismissal.

Trump told NBC News on Thursday that he would have fired the FBI chief "regardless of the recommendation" from the Justice Department.

Many lawmakers from both parties have questioned the timing of Trump's decision to fire Comey, who announced in March that the FBI was probing Russian meddling in the 2016 presidential race, including possible ties between Moscow and Trump’s campaign.