Already, the Federal Government as it would be under McCain is showing us what to expect:

Federal Government Involved in Raids on Protesters -- by Glenn Greenwald of Salon.com
[P]olice attacks on protesters in Minnesota continue . . . .
As the recent "overhaul" of the 30-year-old FISA law illustrated . . . we've essentially decided that we want our Government to spy on us without limits. There is literally no police power that the state can exercise that will cause much protest from the political and media class and, therefore, from the citizenry. Beyond that, there is a widespread sense that the targets of these raids deserve what they get, even if nothing they've done is remotely illegal. We love to proclaim how much we cherish our "freedoms" in the abstract, but we despise those who actually exercise them.
See here for the complete text.