South Carolina state senators have approved a $7 billion spending plan for state taxes after again rejecting Democrats' push to expand Medicaid.

The Senate voted 38-6 on Wednesday to send their budget proposal back to the House. A conference committee will be appointed to work out the differences in the two chambers' plans.

The Senate version expands full-day 4-year-old kindergarten for at-risk students to 14 additional districts.

Democrats fought unsuccessfully to expand Medicaid eligibility to more poor adults as called for in the federal health care overhaul. Republicans did not budge from their repeated refusal last year.

The U.S. Supreme Court ruling upholding the law made it an option rather than a mandate.

Gov. Nikki Haley has repeatedly said as long as she's governor, that won't happen.