Sen. Kamala Harris (D-Calif.) has been campaigning for president on a pledge of support for Medicare for All . Now she is telling voters exactly what she means by that.

Harris on Monday released a plan to create a new, government-run insurance plan designed to cover all Americans and pay for nearly all their medical expenses.

It would likely replace existing employer-sponsored plans, over the course of a decadelong transition, but it would allow private insurers to offer an alternative form of coverage, much as they do today for seniors on Medicare. The Harris plan would also allow employers to contract directly with companies offering these alternative plans and make them available to employees.

Like many campaign proposals, the Harris plan is more a framework than a point-by-point proposal, with many unanswered questions about the transition, the financing, and other vital matters. Even so, the material from Harris contains enough information to convey the general approach she has in mind and how it compares with the plans from rival candidates.

Crudely speaking, the Harris plan calls for a more sweeping transformation than the reforms supported by former Vice President Joe Biden . But it would stop short of the change to wholly government-run insurance that Sen. Bernie Sanders (I-Vt.) has championed.

Exactly where along that spectrum the Harris plan exists depends a bit on your perspective and on some of those details the campaign has yet to provide. But its overall goal is unambiguous. If fully implemented, the Harris plan would result in every American having comprehensive health insurance, achieving an objective that Democrats have been pursuing for nearly a century, most recently with the Affordable Care Act .

That means Harris, like all the Democrats running for president, is pushing in a very different direction than President Donald Trump and his Republican allies, whose ongoing efforts to repeal Obamacare would take away coverage from millions and probably tens of millions of Americans.

In America, health care should be a right, not a privilege only for those who can afford it, Harris wrote in a Medium post introducing her plan.

Where Harris, Biden And Sanders Stand On Health Care

Discussion of how to build on the Affordable Care Act and help Americans still struggling with medical bills has been a dominant theme of the Democratic presidential campaign. The topic is sure to come up when the candidates convene for more debates in Detroit this week, especially on Wednesday night when Harris and Biden, who clashed in last months debate , share a stage.

Bidens proposal, which he put forward two weeks ago, would create a new government-run insurance plan but make enrollment in the plan optional, leaving in place most existing insurance arrangements. He is among the many Democrats wary of Medicare for All, because, they say, it would be too disruptive and too difficult to enact politically.

Harris says a more dramatic change makes sense because a government program like Medicare is the surest, most efficient way to make sure everybody has comprehensive coverage. We have a Medicare system thats already working, Harris wrote in her post. Now, lets expand it to all Americans and give everyone access to comprehensive health care.