Sen. Elizabeth WarrenElizabeth Ann WarrenHere are the potential candidates still eyeing 2020 bids Sanders unveils education plan that would ban for-profit charter schools Warren policy ideas show signs of paying off MORE (D-Mass.) is heading into coal country.

Warren is slated to campaign for Democratic senatorial candidate Natalie Tennant on July 14 in W. Va.'s Eastern Panhandle. Tennant is challenging Rep. Shelley Moore CapitoShelley Wellons Moore CapitoCongressional Women's Softball team releases roster Sinema, Gallagher fastest lawmakers in charity race Kushner, Miller talk immigration at Senate GOP lunch MORE (R-W.Va.), who holds about an eleven percentage point lead.


Capito's campaign already criticized Tennant for seeking to campaign with Warren, who supports President Barack ObamaBarack Hussein ObamaBiden calls for unity, jabs at Trump in campaign launch Several factors have hindered 'next up' presidential candidates in recent years Lewandowski: Why Joe Biden won't make it to the White House — again MORE's carbon emission proposal. Republicans and coal state Democrats say the proposal goes too far and would devastate the coal industry.

"Elizabeth Warren is anti-coal, anti-gun, anti-business and pro-ObamaCare. Everything she stands for is completely at odds with the West Virginia values Natalie Tennant claims to put first," Capito campaign spokeswoman Amy Graham said. "By choosing to align herself with someone like Elizabeth Warren, Natalie Tennant has taken her stunning hypocrisy to a new level."

Sen. Joe ManchinJoseph (Joe) ManchinLabor head warns of 'frightening uptick' in black lung disease among miners Labor leader: Trump has stopped erosion of coal jobs Overnight Energy: States fight Trump rollback of Obama lightbulb rules | Greens seek hearing over proposed rule on energy efficiency tests | Top Dem asks GAO to investigate climate threat MORE (D-W.Va.) has heavily criticized Obama's policies, dubbing it a "war on coal." Manchin, along with Sens. Heidi HeitkampMary (Heidi) Kathryn HeitkampOn The Money: Stocks sink on Trump tariff threat | GOP caught off guard by new trade turmoil | Federal deficit grew 38 percent this fiscal year | Banks avoid taking position in Trump, Dem subpoena fight Fight over Trump's new NAFTA hits key stretch Former senators launching effort to help Dems win rural votes MORE (D-N.D.) and Mary LandrieuMary Loretta LandrieuDems wrestle over how to vote on ‘Green New Deal’ Lobbying world Former New Orleans mayor: It's not my 'intention' to run for president MORE (D-La.) sent a letter to the administration last year urging Obama to revise the regulations.

When asked point-blank whether he'd want Warren to campaign for him, Manchin smirked and said: "Now that I can't comment on... I can't talk about other people's races."

He continued: "[Tennant will] have to make those decisions on her own. And it depends on what Elizabeth has said. The bottom line is this country cannot run without coal."

Manchin said that Warren would find an audience in West Virginia if "she accepts an all-in energy policy where she accepts that we have to use everything we have and there has to be a balance between the economy and the environment."

The Tennant campaign noted that Manchin supports Tennant.

Tennant, in a statement, looked to align herself with Warren's criticism of large financial institutions.

“This campaign is a clear choice between the West Virginia values I represent and the Wall Street dollars Congresswoman Capito represents," Tennant said in a public statement. "Wall Street banks have too much say over Washington already, West Virginia working families and college students deserve a Senator who will speak up for them.”

Manchin has advocated for the administration to spend more research and development money to invest in newer technology for the coal industry.

"What we should be doing is using research and development money that's been sitting at [the Department of Energy] for the last eight years and no one's used it all," Manchin said. 

"If we were able to use that technology and clean up the climate around the world -- that's what we should be doing because there's going to be more coal used than ever before. If Elizabeth can say that, if she understands that, if she accepts that -- it'd be great," Manchin said.

Warren also supported the recent EPA carbon emission proposal released earlier this month for power plants.

"Scientists all around the world have collected mountains of evidence about the dangers of carbon pollution, and their basic conclusions are no longer speculative or debatable. Even so, some politicians respond to this evidence by denying it is true – by rejecting scientific evidence – or by claiming they just can’t understand the science," Warren said in a June 2 speech on the Senate floor supporting the administration's recent EPA proposal. 

"This country wasn’t built by people who ignored facts," she said. "Sure, the deniers can defend their friends in the pollution business. They can rail against science or pretend it doesn’t exist. But the facts are catching up with us: this pollution is killing people across this country... Let the deniers deny the facts – but don’t let them deny our children clean air to breathe or deny our parents long and healthy lives."

Manchin told reporters in Washington a day later: "You know, we talk about deniers. I would say they're the deniers -- not me... They've got to use coal. They've got to use gas because it provides so much of the energy that we use."

In a statement released through the Tennant campaign, Warren said she didn’t agree with the Democratic candidate on all issues, but that Tennant would fight for coal jobs in West Virginia.

“Natalie and I don't agree on every issue. For example, she has made clear to me that she will fight against EPA regulations that I support if she believes it means protecting coal jobs for West Virginia,” said Warren. “But I strongly support Natalie's campaign because I have no doubt she will work in the Senate to make sure working families have a fighting chance to succeed in this country again."

Warren spokeswoman Lacey Rose did not respond to a request for comment.

“Natalie Tennant supports coal – period," Jennifer Donahue, a spokeswoman for her campaign, said in a statement. "Natalie will stand up to President Obama, the EPA, Harry ReidHarry Mason ReidLobbying World Mitch McConnell is not invincible Seven big decisions facing Biden in 2020 primary MORE and anyone else who tries to undermine West Virginia coal jobs.

Congresswoman Capito is grasping at straws in a desperate attempt to distract from her consistent record of doing Wall Street’s bidding at West Virginia’s expense,” she added.

The Warren, Tennant campaign event will be focused on education.

This story was updated on June 24 at 11:41 a.m.