The debt limit creates a constitutional contradiction.
Congress mandates federal spending - no federal program comes into existence without congressional approval. These programs may not originate with the current congress, but they all originated in congress at some time.
Congress also sets the limits on taxation.
The difference between the spending that congress mandates and the limits on taxation is the federal debt.
The 14th amendment requires that congress honor this debt, but the debt limit law (created in 1917) creates a situation where congress can choose not to allow payment of the debt.
Basically, the debt limit law contradicts the 14th amendment. Being that the 14th amendment is part of the constitution and was created long before the debt limit law, it should trump the debt limit law. Therefore the debt limit law is unconstitutional.
Why doesn't any administration bring up this issue with the supreme court?
Here's a discussion:
Is The Debt Ceiling Constitutional? | The Moderate Voice
Obama's control of it is.
-Geaux