"They're not doing me a favor by paying for things that they have already approved for the government to do. That's part of their basic function of government; that's not doing me a favor," said Obama in an interview with Obamacare">NPR, hours before a midnight deadline for a government funding bill.
If lawmakers are unable to pass a spending bill, the federal government will shut down on Oct. 1.
The GOP-controlled House is seeking to tie a bill to defunding or delaying Obamacare, but those measures have been rejected by the Democratic Senate which has passed a "clean" funding bill without restrictions on the healthcare law.
Asked if there were any proposals from the House that he had seen so far that he could sign into law, Obama said "no."
Obama on Monday said time was "running out" and scolded Republicans, accusing them of refighting political battles over Obamacare.
Speaking from the White House press briefing room Obama laid out which government operations would remain open and which would shutter on Tuesday morning and warned that the shutdown would undermine the nation's economic recovery.
The president stressed to NPR said he would not negotiate over his healthcare reform bill.
"We're not going to delay the Affordable Care Act," the president said.