Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE slammed 2020 Democratic presidential candidates Tuesday as "more concerned" about giving rights to murderers than legal gun owners.

"What does it say about the modern-day Democrat Party that @BernieSanders and @KamalaHarris seem more concerned about giving mass murderers like the Boston Marathon Bomber voting rights, than protecting the civil rights of law abiding American citizens who legally own guns?" the president's eldest son asked on Twitter.

What does it say about the modern-day Democrat Party that @BernieSanders and @KamalaHarris seem more concerned about giving mass murderers like the Boston Marathon Bomber voting rights, than protecting the civil rights of law abiding American citizens who legally own guns? — Donald Trump Jr. (@DonaldJTrumpJr) April 23, 2019

Trump Jr. was likely referring to arguments both 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 (I-Vt.) 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.) made during CNN town halls Monday night.

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Sanders said during the town hall that all felons should have the right to vote while incarcerated, including domestic terrorists like the Boston Marathon bomber.

"I think the right to vote is inherent to our democracy," he said. "Yes, even for terrible people, because once you start chipping away ... you’re running down a slippery slope. ... 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.”

Harris during the town hall emphasized the importance of making sure the "formerly incarcerated" maintain the right to vote.

When pressed about whether current felons should also have that right, Harris was noncommittal.

“I think we should have that conversation," Harris said.

Both candidates support stricter gun control laws.

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 (D) broke with Sanders and Harris on felon voting rights, making clear he does not believe that convicted felons should be able to vote while incarcerated.