This isn't a dictatorship. The President doesn't get to unilaterally raise the debt ceiling.
I wouldnt be too sure on the first point. And we'll see on the second.
I honestly believe that Obama will issue an EO to the Treasury to borrow the money based on his alleged 14thA authority. At that point we have a dictatorship because Congress will not impeach and remove him.
Personally I think theres more chance of ET landing on your lawn than Obama using that 14th Amendment. Its Congresses role to raise the ceiling and if they don't then the buck stops with them, I'm surprised that Obama hasn't mentioned it would be those members in the House that would be acting against the constitution.
Think of it politically, there would definitely be enough votes to pass a clean debt ceiling, you'd get enough moderate Republicans to cross over. At that point if Boehner refused to allow a clean vote then the default would lie with the GOP.
Those moderates are more worried about the fall out from a default than the TP, for the timebeing we've not seen any big rifts opening up in the GOP but as October 17 gets closer that's likely to change. At this point the best thing all round is for people to take a step back and calm down, Congress should vote to open the government and raise the debt ceiling for a few months and everyone needs to get round the table and find some way of cutting a deal that gives a little to both sides.