Honestly, I think that if Bush gets re-elected, completing the scuttling of Roe v Wade, invading Iran, castrating any remaining environmental protections, and driving the economy farther into the toilet is almost a *best-*case scenario.
At worst? Pick any six of the below and stir —
He invades Iran, botches it, pisses off the few remaining allies we’ve got, responds to the increasingly vocal and infuriated domestic agitation by tagging dissent as equivalent to terrorism to the loud approval of an increasingly vocal and infuriated bloc of Americans who think he’s right; large-scale violence breaks out between partisan factions and between policy critics and police/military forces arresting and dispersing them;
He invades at least two other Islamic-majority countries after it becomes apparent that they are working directly with anti-American forces in Iraq, Iran, and Afghanistan;
One or more significantly destructive terrorist incident occurs on American soil with large-scale casualties and the world cheers; he responds belligerently and tells the rest of the planet to shove it and threatens retaliation not only against nations attacking the US but against any nation not directly helping the US retaliate against them;
The majority of the non-Islamic members of the UN form a new organization centered in Brussels which becomes, de facto, an alliance against the US and negotiates formal and informal nonaggression pacts with the Islamic alliances;
Internationally the value of the dollar is perceived as overinflated and investments in US assets and endeavors slows dramatically in favor of investment in Chinese and European markets; the US economy stagnates, inflation increases, hiring never picks up, wages increase slower than cost of living, and the stock market goes bearish, and finally the bottom drops out;
Mergers in media, allowed & even encouraged by the administation, lead to all broadcast networks medium-sized or larger and all papers in cities of >100,000 being owned by right-wing conservative organizations such as those of Murdoch and Scaife; criticism of the administration is brought to a trickle on conventional media;
ISPs merge and/or are bought out and a few start imposing content restrictions on customers; courts hold that they have this right; the trend spreads and expressing anti-American sentiment will lose you your service under most contracts; ISPs also scan your email for content with software, both to look for contract violations and to report possible terrorist activities (along with other possibly illegal or questionable activities) to Homeland Security;
By 2008, coverage of the primaries and election are blatantly skewed towards pro-Republican perspectives; the majority of people in the US and elsewhere believe the election will not be run fairly and according to the rules but also have no faith that they’d hear about anything untoward happening; in Republican primaries, remaining moderate Republicans now face off with heavily-financed far-right conservatives and those that remain are told to swear allegiance to a conservative party platform or be evicted from the party