The US doesn't have a parliamentary system. Obama's powers won't change however the elections come out. In the past week or so, he has started to show the obstructionists that they have a price to pay for getting in his way. Bush and Truman and many other Presidents have made such demonstrations. It is not a good idea to piss of any US President.
Australian police arrest 5 over shooting 'linked to terrorism' (Reuters)
from the article: Palestinian PM to Haaretz: We will have a state next year