USpol, debt limit, Republican brazenness
Keep in mind that the Treasury says it will have enough money to service its debts, so Biden is threatening to default, to not pay debts, even though he can, which is very brazen, and would be an illegal, impeachable offense if he followed through on that threat.
So yes, seriously.
And I really wish the reporting about the debt ceiling didn't buy the spin the administration is putting on it, and looked at the math instead.