Former Speaker Newt Gingrich (R-Ga.) says the Democratic presidential primary’s superdelegate rules are designed to stop candidates like Bernie SandersBernie SandersWinners and losers from the South Carolina debate Five takeaways from the Democratic debate Sanders most searched, most tweeted about candidate during Democratic debate MORE.

“I think clearly that the superdelegate model was designed to stop outsider candidates like Sanders, and in that sense, they’re doing what they’re designed to do,” Gingrich said Tuesday on Fox News’s “Fox and Friends.”

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He added that the rising frustration of the Vermont senator's supporters shows that the Democratic primary process has major flaws.

“If you look at the bitterness in Nevada, the bitterness in Alaska, these Democratic conventions, they actually have a greater tension going into their convention than the Republicans do,” Gingrich said. "Nobody would have guessed that two months ago.”

Nevada’s Democratic convention erupted in turmoil Saturday, with Sanders’s supporters booing Sen. Barbara BoxerBarbara Levy BoxerFormer Democratic Sen. Barbara Boxer joins DC lobbying firm Hillicon Valley: Ocasio-Cortez clashes with former Dem senator over gig worker bill | Software engineer indicted over Capital One breach | Lawmakers push Amazon to remove unsafe products Ocasio-Cortez blasts former Dem senator for helping Lyft fight gig worker bill MORE (D-Calif.) and angrily protesting the state’s delegate rules.

Democratic front-runner Hillary ClintonHillary Diane Rodham ClintonDemocratic insiders stay on the sidelines in 2020 race Hillicon Valley: Twitter falling short on pledge to verify primary candidates | Barr vows to make surveillance reforms after watchdog report | DHS cyber chief focused on 2020 The Hill's Campaign Report: High stakes at last Democratic debate before Super Tuesday MORE ultimately edged out Sanders by two delegates after the chaotic event, taking seven to Sanders's five.

The former secretary of State now has 20 Nevada delegates to Sanders’s 15.

Senate Minority Leader Harry ReidHarry Mason ReidDemocratic insiders stay on the sidelines in 2020 race Harry Reid calls for end to all caucuses Reid pushes back on Sanders suggestion that a Democrat with plurality of delegates should be the nominee MORE (D-Nev.) on Monday blamed Sanders’s backers for the fracas, adding that he hoped his fellow senator would denounce their behavior.

“I’ve been dealing with Nevada state conventions for 50 years,” he said on CNN. "To say I was disappointed was an understatement. I hold his people accountable, and I’m sure if Bernie found out about it, he would not accept what happened there."

Clinton remains the Democratic presidential front-runner, with 1,716 pledged delegates to Sanders's 1,433, heading into Tuesday's primaries in Oregon and Kentucky.