Former Speaker Newt Gingrich (R-Ga.) says the Democratic presidential primary’s superdelegate rules are designed to stop candidates like Bernie SandersBernie SandersFormer Sanders press secretary: 'Principal concern' of Biden appointments should be policy DeVos knocks free college push as 'socialist takeover of higher education' The Hill's 12:30 Report — Presented by Capital One — Giuliani denies discussing preemptive pardon with Trump 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 BoxerBiden plays it cool as Trump refuses to concede The Hill's Morning Report - Presented by Facebook - Biden, Harris launch Trump offensive in first joint appearance Bottom line MORE (D-Calif.) and angrily protesting the state’s delegate rules.

Democratic front-runner Hillary ClintonHillary Diane Rodham ClintonHillary and Chelsea Clinton to host series based on their book 'Gutsy Women' Democrats see spike in turnout among Asian American, Pacific Islander voters Biden officially announces ex-Obama official Brian Deese as top economic adviser 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 ReidFeinstein departure from top post sets stage for Judiciary fight Whitehouse says Democratic caucus will decide future of Judiciary Committee Bottom line 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.