Jan. 10 (Bloomberg) — Congressional negotiations on reviving U.S. unemployment benefits for the long-term jobless were dealt a setback as Democrats and Republicans sparred over how to pay for the aid and how long it should be extended.

Republicans yesterday expressed opposition to Senate Majority Leader Harry Reid's Democratic plan to renew the benefits through mid-November partly because he won't let changes be offered to the proposal on the chamber's floor.

Reid, a Nevada Democrat, touted his proposal as meeting Republican demands that the price tag would be covered by budget reductions.