Stocks are so far looking past the brewing congressional debt ceiling drama but that could change quickly if it becomes very contentious.

As if in a chorus, President Barack Obama, Fed Chairman Ben Bernanke and Treasury Secretary Tim Geithner all warned on Monday that Congress needs to raise the debt ceiling to allow the U.S. to pay its bills. In a letter to Congress, Geithner said the U.S. will hit the ceiling between mid-February and early March, and noted that the government would then have to be funded by whatever cash the Treasury Department has on hand on a given day. He warned even a brief default would be terribly damaging.