Donnelly wants to allow businesses to hire workers for up to 40 hours per week without being required to provide health insurance.
Senate President Pro Tem David Long is warning of far-reaching consequences if the government rejects Indiana's request to expand the Healthy Indiana plan.
Health care navigators in Indiana say they have had a relatively good experience signing people up for insurance.
The number of insurance carriers and plans offered through the federal healthcare exchange in Indiana will dramatically increase this year.
Indiana's uninsured rate fell slightly from last year, but the rates in other states fell more sharply as the Affordable Care Act went into effect.
Insurance companies are facing higher costs after increased enrollments have led to more hospital visits for treatment.
A top insurance trade group is pushing the Obama administration to approve a new catastrophic plan, which they believe would help stabilize premiums.
The Senate is beginning consideration of a bill to revive more than 50 expired tax breaks.
Young's legislation would allow companies to hire part-time employees that work up to 39 hours per week without providing them health care coverage.
The GOP proposes changes to the 30 hour work week provision of the Affordable Care Act