Former Rep. Beto O’Rourke (D-Texas) hit back at his fellow 2020 Democratic presidential candidate South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The 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 MORE over their diverging stances on the merits of a gun buyback program.

O'Rourke had hit Buttigieg earlier this month over the mayor's hesitancy to back a mandatory buyback program for assault rifles.

In an interview on Monday, Buttigieg responded to O’Rourke’s criticism, saying the former Texas congressman was just looking to make headlines.

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“I get it. He needs to pick a fight in order to stay relevant,” Buttigieg said in an interview with Snapchat’s “Good Luck America.”



O’Rourke responded, quote-tweeting the interview along with a new jab.



“Pete can belittle the grassroots; he can call buybacks a 'shiny object.' He can say whatever he wants, but guns kill 40,000 people each year,” O’Rourke tweeted. “Those people deserve action. I’ll be fighting for them.”

Other Democratic presidential candidates were quick to pile on Buttigieg as well, with Sens. Cory Booker Cory Anthony BookerThe movement to reform animal agriculture has reached a tipping point Watchdog confirms State Dept. canceled award for journalist who criticized Trump 3 reasons why Biden is misreading the politics of court packing MORE (D-N.J.) and Kamala Harris Kamala HarrisTexas Democratic official urges Biden to visit state: 'I thought he had his own plane' The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements A game theorist's advice to President Trump on filling the Supreme Court seat MORE (D-Calif.) also tweeting their displeasure with his comments.

“Leaving more than 5 million assault weapons on the street isn't a ban, it's a Band-Aid,” Harris tweeted in response to Buttigieg calling mandatory gun buybacks “confiscation.”

Leaving more than 5 million assault weapons on the street isn't a ban, it's a Band-Aid. https://t.co/LuAbJAwOZh — Kamala Harris (@KamalaHarris) October 14, 2019

Meanwhile, Booker said that Buttigieg calling gun buyback programs "confiscation" is "doing the NRA's work for them," adding that the National Rifle Association doesn't "need our help."

Calling buyback programs "confiscation" is doing the NRA's work for them, @PeteButtigieg—and they don't need our help. https://t.co/eshiBU7PIg — Cory Booker (@CoryBooker) October 14, 2019

Buttigieg has released a plan to address gun violence that calls for universal background checks, the implementation of a "red flag" gun law, and a ban on the sales of assault weapons and high-capacity magazines.

O’Rourke has been a vocal supporter of mandatory buybacks since a mass shooting rocked his hometown of El Paso, Texas. He was praised by his fellow candidates at the last Democratic debate for his response to the shooting.

Buttigieg, O'Rourke, Booker and Harris are all expected to take the debate stage alongside eight others on Tuesday night.