"Our view is this economy would benefit from more certainty and less brinksmanship. So the longer the period of time is, the better for the economy," said Lew, who also repeated Obama's willingness to accept a short-term extension for now.
Finance Committee Chairman Max Baucus, D-Mont., said GOP demands to curb Obama's 2010 health care law as the price for ending the shutdown "is not up for debate" and would not happen.
"We need to reopen the government and pay the nation's bills, no strings attached," said Baucus.
Wednesday featured lots of activity but no progress toward ending the budget and debt limit impasses.
Obama had House Democrats over to the White House, while Republican conservatives heard a pitch from the House Budget Committee chairman, Rep. Paul Ryan, R-Wis., on his plan to extend the U.S. borrowing cap for four to six weeks while jump-starting talks on a broader budget deal that could replace cuts to defense and domestic agency budgets with cuts to benefit programs like Medicare and reforms to the loophole-cluttered tax code. Curbs to "Obamacare" were not mentioned.
At the White House, Obama told House Democratic loyalists that he still would prefer a long-term increase in the nation's $16.7 trillion borrowing cap but said he's willing to sign a short-term increase to "give Boehner some time to deal with the tea party wing of his party," said Rep. Peter Welch, D-Vt.
A midday meeting Wednesday between the two top House Republicans and Democrats, meanwhile, yielded no progress.
Obama also invited the entire House GOP to the White House on Thursday but Boehner opted to send a smaller squadron of about 20 mostly senior members
The frustrating standoff in Washington is weighing down each side's poll numbers, but Republicans are taking the worst drubbing. A Gallup poll put the approval rating for the Republican Party at a record-low 28 percent. Polls have consistently said the Republicans deserve the greater share of blame for the shutdown.
Associated Press Writers Alan Fram, Stephen Ohlemacher and Martin Crutsinger contributed to this story.