In this July 25, 2016 file photo, Sen. Bernie Sanders speaks during the first day of the Democratic National Convention in Philadelphia. 

(AP Photo/Paul Sancya, File)

Sen. Bernie Sanders, and his new political organization Our Revolution, are officially backing the Colorado ballot initiative that would establish a universal health care system in the state.

The causes he and his group are actively supporting include Amendment 69, also known as ColoradoCare.

“It is absurd, it is beyond belief, that here in America we remain the only major country on earth not to guarantee health care to all people," Sanders said at a rally in Vermont Wednesday. "If that proposal can win in Colorado, I believe that idea will spread around the country.” 

The group “No on 69” opposes the measure, saying it will be too expensive for the state, Colorado businesses and individuals.

"Sen. Sanders drawing attention to it just adds another opportunity for us to talk about the specific problems with Amendment 69," said No On 69 spokesman Sean Duffy.

The measure will go to Colorado voters this fall.