Louise Sheiner of the Brookings Institution told Newsweek she could "easily see a recession" if the U.S. defaults on its debt.
Even conservative economists are warning that the consequences could include a stock-market spiral and significant job losses.
"I don't want to see the 118th Congress fall down into chaos," Republican Representative Tony Gonzales told Newsweek.
The new Democratic governor, however, received a standing ovation from Democrats when discussing the state's water crisis and more funds for public education.
The House will reconvene at noon on Friday in the hope of electing a speaker on the fourth day of ballots.
The House will meet again on Friday and make a fresh attempt to elect a speaker following three days of failed ballots.
McCarthy failed to secure a majority of votes over the course of three ballots, with 20 Republicans ultimately breaking rank to oppose him.
Greene has clashed with some of her closest allies over Kevin McCarthy's bid to become speaker of the House.
Here's a breakdown of the key players and issues at the center of the GOP's most recent infighting.
The group of right-wing Republicans is expected to have some new members in the next Congress despite potential losses.
"The scum and liars in the media are calling me a racist by taking something out of context," the congresswoman told Newsweek.
Moderate Republicans fear a voter backlash if states are allowed to opt out of Obamacare.
Insurers will be able to charge sick patients more than healthy ones.
The amendment would allow lawmakers and their staff to sidestep insurance that discriminates against their pre-existing conditions
States are obliged to provide a free public education as a right. Why not health care?
A 35-page blueprint developed by House Republican leaders, known as a "Better Way," will serve as a starting point for the tax-reform discussions.
Trump and the GOP have left the most powerful nation in the world rudderless.
After the House Freedom Caucus derailed the healthcare bill, chief of staff says Trump would 'talk to anyone' on a tax bill.
Caucus members see Trump and Ryan preserving Obamacare programs.
Ryan didn't get the four-fifths needed for an endorsement, but convinces enough to back him.
Late on Tuesday, Ryan said he would pursue the top House job if his fellow Republicans united behind him.
The "proposition that somehow the conference drafts him and he accepts under the condition there are no conditions...that would be a huge mistake."