If the Republicans get back into power, look for:

• Social Security and Medicare to be discontinued. This will lead to swathes of old people dying of hunger and disease. The third world will look like a health spa.
• Environmental protection will be gutted or eliminated entirely. We already know what this looks like -- remember the Cuyahoga River, anyone? And at a much more massive scale. Look for people to get sick, and entire runs or even species of fish and waterfowl to die. Also look for strip mining firms to no longer be required to clean up after themselves, and massive livestock outfits to no longer even pretend to cleanly dispose of their wastes.
• More purges of voter records which end up --"oopsie!"-- deleting people who really should have a right to vote, and who are all (amazing, isn't it?) people of colour, or poor.
• All regulation removed from insurance. Nobody will be insurable in about 10 years except young people who have always been healthy. Once they get sick -- BAM! -- end of coverage.
• All regulation removed from banking, where risk is socialized (FDIC will still pay for failed banks) but reward is privatized (only the über-rich will benefit).
• Appointment of more hyper-extreme-conservative judges to the SCOTUS, resulting, ultimately, in an overthrow of Roe v Wade and many other important freedoms.
• Tax burden even further shifted from the rich to the middle class.
• Last vestiges of anti-trust regulations removed, so that giant monopolies form in many industries / service sectors. Federal regulations are then put in place to make their monopoly absolute and make the rising of small competitors impossible. (This is already underway with the FDA -- they continue to make it harder and harder for small independent farmers who don't owe their souls to Monsanto or Cargill.)
• Complete take-over of the public airwaves by a very small group of propagandists plus heavy regulation or economic segmentation of the internet, the two making it harder and harder for an independent news voice to get its message across.
• A constitutional amendment proposed banning gay marriage and instituting other "pro-family" policies.
• Total alienation of all the nations of the world except Israel and Red China.
• Increasing restrictions on exercise of BOR rights, whether by law or executive order.
• More and deeper debt to fund more wars (perhaps North Korea or Iran)
• Potential reinstatement of the draft (see previous point)
• Unlimited drilling in any and all sensitive areas, with regulatory oversight pared back or eliminated.
• Preferential treatment for Christian, especially Evangelical Christian, firms and individuals in government hiring, regulations, permitting, contract awards, etc.
• End of tax regulations on political speech for religious nonprofit organizations (at least Christian ones, anyway).
• End of anti-redlining and other federal-level anti-discrimination laws.
• Continued hypocrisy over deposing illegal immigrants while letting huge agribusiness continue to employ them as long as it's all kept hush-hush.
• Continued overriding of local authorities in high-visibility so-called "morality" issues (think Terry Schiavo, non-ground-zero non-mosque).

"What?" you ask, "Are you such a conspiracy theorist?!" -- Hell, no. The Republicans have been working in this direction for decades right out in the open. Why would they need a conspiracy? They didn't secretly award no-bid contracts to Halliburton (for example). They did it under everybody's noses! No conspiracy at all. The say "fuck you" to us, right in our teeth.