Sen. Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.) is calling for the Senate to vote on Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE's (I-Vt.) idea of letting inmates in federal prisons vote, arguing that Democrats should go on the record.

"Let’s vote on @BernieSanders idea to allow rapists, murderers, and terrorists to vote from prison. See where every elected official stands!" Graham said in a tweet on Thursday.

Let’s vote on @BernieSanders idea to allow rapists, murderers, and terrorists to vote from prison.



See where every elected official stands!https://t.co/ZwFETdbM7h — Lindsey Graham (@LindseyGrahamSC) April 25, 2019

Sanders said during his CNN town hall earlier this week that all prisoners, including domestic terrorists such as the Boston Marathon bomber, should have the right to vote while they are incarcerated.

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"I do believe that even if they are in jail, they’re paying their price to society, but that should not take away their inherent American right to participate in our democracy," Sanders said.

He doubled down on his position on Thursday, saying that he had "been criticized for saying this, so let me say it again: Every American citizen should have the right to vote, even if they are in jail."

Other 2020 contenders have stoped short of endorsing Sanders's idea.

Former Rep. Beto O'Rourke Beto O'RourkeJimmy Carter says his son smoked pot with Willie Nelson on White House roof O'Rourke endorses Kennedy for Senate: 'A champion for the values we're most proud of' 2020 Democrats do convention Zoom call MORE (D-Texas) said he would support voting rights for nonviolent offenders; South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegThe Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice Hillicon Valley: FBI, DHS warn that foreign hackers will likely spread disinformation around election results | Social media platforms put muscle into National Voter Registration Day | Trump to meet with Republican state officials on tech liability shield MORE said he does not believe that felons should be able to vote while incarcerated, and Sen. Kamala Harris Kamala HarrisHarris faces pivotal moment with Supreme Court battle Nearly 40 Democratic senators call for climate change questions in debates Joe Biden has long forgotten North Carolina: Today's visit is too late MORE (D-Calif.) said there should be a "conversation" on the issue.

The move has sparked backlash from Republicans, who characterize the position as extreme. Sen. Cory Gardner Cory Scott GardnerCook Political Report shifts Colorado Senate race toward Democrat Overnight Health Care: US coronavirus deaths hit 200,000 | Ginsburg's death puts future of ObamaCare at risk | Federal panel delays vote on initial COVID-19 vaccine distribution The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting MORE (Colo.) posted a series of tweets against the idea, mocking it as the "Supermax Precinct."

Graham, earlier this week, argued that Sanders should come to South Carolina and explain why convicted 2015 Charleston church shooter Dylann Roof should be allowed to vote.

"I look forward to hearing his explanation — in South Carolina — why Dylann Roof should be allowed to vote in the upcoming elections," he said.