Pollster: Dem party 'rift' won't carry on to midterms

Pollster Lee Miringoff said on Thursday that he didn't think the rift between progressive and centrist Democrats would carry over into November's midterm elections. 

“There’s a sense that is there really a split within the Democratic Party that’s carried over from the Clinton-Sanders contest in 2016? Or are the Democrats strong enough to be unified against Donald TrumpDonald John TrumpAmash responds to 'Send her back' chants at Trump rally: 'This is how history's worst episodes begin' McConnell: Trump 'on to something' with attacks on Dem congresswomen Trump blasts 'corrupt' Puerto Rico's leaders amid political crisis MORE this November," Miringoff told Hill.TV's Joe Concha on "What America's Thinking." 

Miringoff's comments come as more progressive upstarts are challenging the party's lawmakers, most notably Alexandria Ocasio-Cortez, who defeated longtime Rep. Joe CrowleyJoseph (Joe) CrowleyPoll shows congresswomen attacked by Trump with weak favorability ratings Ocasio-Cortez gets new Republican challenger: report CBC lawmakers rip Justice Democrats for targeting black lawmakers for primaries MORE (D-N.Y.) in a stunning primary upset in New York's 14th congressional district.

“When the race with Ocasio-Cortez broke loose…this notion that ‘see the Democrats are really moving further to the left this time,’ I’m not so sure that’s happened in other places," he continued. 

"Bernie SandersBernie Sanders2020 Democrats react to 'send her back' chants at Trump rally Cardi B posts message of support for Ilhan Omar #IStandWithIlhan trends after crowd at Trump rally chants 'send her back' MORE endorsements haven’t done a whole lot. I’m not sure the rift within the Democratic Party is really a rift or an occasional crack that doesn’t really carry through to November. I think Democrats are probably stronger in their opposition to Donald Trump than having a split internal to them," he added. 

Sanders and Ocasio-Cortez have thrown their support behind an array of progressive candidates ahead of the midterms. 

However, many of the candidates they have endorsed have been unsuccessful in their primaries. Only one of Sanders' endorsed candidates, was successful in their respective primary races last week.

Progressive candidates running as Democrats are also vowing to shake up the party if they win, with a number of them declining to back House Minority Leader Nancy PelosiNancy PelosiSally Yates: Moral fiber of US being 'shredded by unapologetic racism' Al Green calls for additional security for House members after Trump rally #IStandWithPresTrump trends in response to #IStandWithIlhan MORE (D-Calif.) for the Speaker's gavel if they retake the House.

— Julia Manchester