Originally I think his lack of experienced allowed him to get played by the pros in his party re: stimulus and healthcare. Then I think he had favors he had to repay for help getting elected and finally I think he got swallowed up by the DC machine and became just another tool for the elites.
Or it's just all the republican's fault.
i think you're pretty spot on..how is that his fault, though? and what do you suggest he could have done better to not fall into the trappings of it all?