BOULDER, Colo. — Bernie Sanders has urged hundreds of people in two Colorado appearances to vote for Democratic presidential candidate Hillary Clinton and for a ballot measure to set up the nation’s first universal health care system.

The Coloradoan reports ( that the Vermont senator touched on climate change, immigration, job creation and other themes in backing former rival Clinton during a Monday appearance at Colorado State University.

Sanders later promoted Amendment 69, the universal coverage measure, in a speech at the University of Colorado in Boulder.

The $25 billion plan would eliminate private insurance in favor of a 10 percent “premium tax,” with the state covering health expenses. Employers would share employees’ costs.

Sanders defeated Clinton in Colorado’s Democratic presidential caucuses in March.