A report from NBC News counts at least 50 Democratic candidates on the ballot in the general election who say they won't back House Minority Leader Nancy Pelosi Nancy PelosiPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Trump signs largely symbolic pre-existing conditions order amid lawsuit MORE (D-Calif.) for Speaker if the party retakes the chamber in the midterms.

Of the 51, nine are incumbents, including Rep. Tim Ryan Timothy (Tim) RyanNow's the time to make 'Social Emotional Learning' a national priority Mourners gather outside Supreme Court after passing of Ruth Bader Ginsburg Lincoln Project hits Trump for criticizing Goodyear, 'an American company' MORE (Ohio), who challenged Pelosi to lead Democrats in the House in 2016 and lost. In addition to those 51 candidates, another 34 have declined to offer support for Pelosi, saying that it is too early to decide.

Pelosi has repeatedly insisted that she believes Democrats will retake the House and that she intends to reclaim the Speaker's gavel.

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But the longtime Democratic House leader is a polarizing figure and a number of Democrats have distanced themselves from her this election cycle.

“Leader Pelosi has always enjoyed the overwhelming support of House Democrats and that will continue into the majority she's so focused on winning,” Pelosi's deputy chief of staff told NBC News.

The most recent Democratic candidate to oppose Pelosi for speaker is Michigan's Rashida Tlaib, who won her primary this week and is poised to be the first Muslim woman in Congress.

She told CNN on Thursday that Pelosi “doesn't speak about the issues that are important to the families of the [Michigan] 13th Congressional District, and they are a priority for me.”

In a tight Democratic primary in Massachusetts, both of the leading candidates, Rep. Michael Capuano Michael (Mike) Everett CapuanoHillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections 'Markeyverse' of online fans helps take down a Kennedy Inside the progressive hunt for vulnerable House Democrats MORE (D-Mass.) and his progressive challenger, Ayanna Pressley, said in a debate this week that they were not ready to support Pelosi.

They join a number of Democrats in high profile races who backed away from Pelosi.

Rep. Conor Lamb (D) won a Pennsylvania House special election in March. During the race, Republicans tried to paint Lamb as a rubber stamp for Pelosi and liberal Democrats' agenda. Lamb, though, repeatedly said he would not back Pelosi for speaker.

Pelosi, the first female Speaker of the House, has been the Democratic leader in both the minority and majority since 2003. She is the longest-serving leader since the 1950s and would be the first since 1955 to lose and regain the Speakership should Democrats win a majority and elect her Speaker. She has been a powerful fundraiser for the party.

Pelosi still maintains support from a large number of Democratic lawmakers. Another silver lining for Pelosi’s plans to retake the gavel is the lack of an obvious heir apparent. Rep. Joseph Crowley (D-N.Y.), a member of leadership who was seen as a potential future Speaker, was upset in his primary by Alexandria Ocasio-Cortez.

Ocasio-Cortez has also said she will not commit to backing Pelosi until after the election.