The possibility of invoking the 14th Amendment to the US Constitution to avert a debt default is causing legal uncertainty. President Biden said this week that he had discussed the use of the amendment with advisers, but warned that it would only apply for future attempts to solve the problem. If he chose to act unilaterally, the financial system would be at risk if this were tied up in the courts. Republicans could sue Biden, arguing that he ignored the debt limit and violated federal spending and taxation. Besides, the US Supreme Court has not ruled definitively on the clause stating that the sovereign debt of the US "shall not be questioned." Some scholars believe that this clause gives the President the power to instruct the Treasury to borrow money and ignore the debt limit but have warned of serious repercussions if this were to come to pass. If President Biden decides to use the 14th Amendment, Republicans could sue him, and the courts would have to determine whether his decision was constitutional.