But can you have a showdown if Obama refuses to show up?
                                
                                
                                    (Newser) -
                                    President Obama  signed the fiscal cliff tax deal  last night, and you know what that means: Time for the debt ceiling fight! Technically, the government has already reached its $16.4 trillion borrowing limit, and is relying on "extraordinary measures" to get by. By the end of next month,...