Thune: Democrats showing interest in GOP extender bill

Thune's substitute offers similar tax relief and extends funding for many of the same programs included in the Democratic proposal, but it is paid for by undoing stimulus spending. According to the Congressional Budget Office, the Thune option would reduce the deficit by $68 billion. 

"There's a whole series of things that we think make a lot of sense at a time when the American people are asking Congress to be more fiscally responsible," Thune said. 

The senator said a vote could occur on his proposal on Thursday.