We have (or had) an important set of checks and balances built into our democracy to make sure that unchecked power doesn't become tyranny. Some of the key parts of that system have been the principles of Habeas Corpus (people can't be kept in prison without their day in court) and Posse Comitatus (the military is not to be used against the citizens nor as police, except in extreme cases and with all caution.) In the past the Administration needed the permission of Governors and/or Congress to deploy National Guard or US Military forces to action on US soil.
Senator Patrick Leahy (D-VT) seems to be one of the few people that noticed that on the same day that the POTUS signed the bill killing Habeaus Corpus, he signed another bill that took a big stab at Posse Comitatus. Bush no longer needs approval of Congress or Governors to deploy troops against the citizens to stop disorder.
So, theoretically speaking, if the next election were to be blatently stolen and there were large protests, The Administration could deal with it as they saw fit without bothering Congress or the Governors. You feel safer, don't you? Checks and balances are for obstructionists.