The 1,500 page health care measure passed by the Senate Finance Committee is now available to the public.
    
The massive bill will serve as the starting point for Democratic debates on health care.
    
However, Politico reports that Sens. John Kerry, D-Mass, Chuck Schumer, D-N.Y., Robert Menendez, D-N.J., Debbie Stabenow, D-Mich, and John Rockefeller, D-W.Va, are worried about one of the bill's main provisions - a 40 percent tax on high-end insurance plans.
    
The tax would hit individuals who pay more $8,000 a year for their insurance and families who pay more than $21,000.
    
The five senators say those levels are too low and will hit the middle class.  "We remain concerned that the thresholds are too low and will impact plans that are not overly generous and that, in 2019, far too many plans will be impacted by the excise tax," the senators wrote in a one-page document released with the bill.  

"We plan to continue to work with Chairman Max Baucus on this issue to ensure that provision bends the cost curve, but not at the expense of middle-income Americans," they said.