Four Senate Democrats broke ranks Thursday and voted to approve an amendment aimed at prohibiting a carbon tax. 

The Senate voted 58-42 on an amendment offered by Sen. Roy BluntRoy Dean BluntDems to reframe gun violence as public health issue Senate heads toward floor fight on criminal justice bill The Year Ahead: Tech braces for new scrutiny from Washington MORE (R-Mo.) that would set up a deficit-neutral reserve fund to prohibit a federal tax or fee on carbon emissions from any entity that, directly or indirectly, is a source of the emissions. 
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Red-state Democrats Sens. Joe Donnelly (Ind.), Heidi HeitkampMary (Heidi) Kathryn HeitkampHatch warns Senate 'in crisis' in farewell speech Dem senators Heitkamp, Donnelly urge bipartisanship in farewell speeches House passes bipartisan bill aimed at reversing rising maternal mortality rates MORE (N.D.) Claire McCaskillClaire Conner McCaskillThe Year Ahead: Tech braces for new scrutiny from Washington McCaskill: 'Too many embarrassing uncles' in the Senate FEC votes to allow lawmakers to use campaign funds for personal cybersecurity MORE (Mo.) and Joe ManchinJoseph (Joe) ManchinOvernight Defense: Senate bucks Trump with Yemen war vote, resolution calling crown prince 'responsible' for Khashoggi killing | House briefing on Saudi Arabia fails to move needle | Inhofe casts doubt on Space Force Hillicon Valley — Presented by AT&T — New momentum for privacy legislation | YouTube purges spam videos | Apple plans B Austin campus | Iranian hackers targeted Treasury officials | FEC to let lawmakers use campaign funds for cyber Manchin puts hold on FCC nomination over wireless internet fund delay MORE (W.Va.) voted with Republicans.

Blunt, ahead of the vote, suggested that the amendment was necessary to help protect Americans from higher utility bills and "send a clear message" to President Obama.
 
"This vote is important to send a clear message to the administration that Americans simply can't afford to pay higher utility bills because of bad energy policies," he said. 
 
But, Sen. Barbara BoxerBarbara Levy BoxerCalifornia AG Becerra included in Bloomberg 50 list Climate debate comes full circle Fox's Ingraham transitioning longtime radio show to podcast MORE (D-Calif.) suggested ahead of the vote that putting "a price" on carbon could lead to a better economy. 
 
"When you put a price on carbon it works," she said. "If you look at my state, we are creating jobs in clean energy, we're balancing our budget better than we ever have before. ... So I don't know why on earth we would say 'no' to something that leads to prosperity."