We believe that Congress has the sole authority to raise our borrowing -- debt ceilings and increase our borrowing authority, and that Congress needs to act accordingly.
We had a judgment to make, but whether the president's actions are, in fact, grounds for an impeachment, or some other sanction, is a decision in the sole discretion of the Congress.
Under the so-called "dormant Commerce Clause" doctrine (dormant because it isn't actually written anywhere) the Supreme Court has interpreted the Commerce Clause in the Constitution, which gives Congress the sole right to regulate interstate commerce, as a mandate to strike down state laws that interfere with same.