It's a long article, but well worth the read:
America as a One-Party State
Today's hard right seeks total dominion. It's packing the courts and rigging the rules. The target is not the Democrats but democracy itself.
...But if President Bush is re-elected, we will be close to a tipping point of fundamental change in the political system itself. The United States could become a nation in which the dominant party rules for a prolonged period, marginalizes a token opposition and is extremely difficult to dislodge because democracy itself is rigged. This would be unprecedented in U.S. history.
In past single-party eras, the majority party earned its preeminence with broad popular support. Today the electorate remains closely divided, and actually prefers more Democratic policy positions than Republican ones. Yet the drift toward an engineered one-party Republican state has aroused little press scrutiny or widespread popular protest.
We are at risk of becoming an autocracy in three key respects. First, Republican parliamentary gimmickry has emasculated legislative opposition in the House of Representatives (the Senate has other problems). House Majority Leader Tom DeLay of Texas has both intimidated moderate Republicans and reduced the minority party to window dressing, rather like the token opposition parties in Mexico during the six-decade dominance of the PRI.
Second, electoral rules have been rigged to make it increasingly difficult for the incumbent party to be ejected by the voters, absent a Depression- scale disaster, Watergate-class scandal or Teddy Roosevelt-style ruling party split. After two decades of bipartisan collusion in the creation of safe House seats, there are now perhaps just 25 truly contestable House seats in any given election year (and that's before the recent Republican super gerrymandering).
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Third, the federal courts, which have slowed some executive-branch efforts to destroy liberties, will be a complete rubber stamp if the right wins one more presidential election.
Taken together, these several forces could well enable the Republicans to become the permanent party of autocratic government for at least a generation. Am I exaggerating? Take a close look at the particulars. More:
http://www.prospect.org/print/V15/2/kuttner-r.html