What would be suggested for preparations?
The economy is cyclical by nature and election years / going into them causes a lot of speculation and unpredictability. Stock markets thrive on predictability, so, obviously if things go the opposite way we're going to see some turbulence.
The last "Great Recession" was really, really junky. But, those most screwed by it were the part of the population attempting to retire or go into retirement (or already in retirement) shortly at or after 2008. Anyone not in that group (so, working age and younger) felt some pain but, if they were able to continue working (no job loss), then the storm was easily weathered. (FWIW, I'm in marketing and guess what? We're the first team to go when the $h!T hits the fan and yea, 2008-2011 really sucked for me).
So, you need to ask yourself some questions. In your industry, are you looking at potential job loss during a recession? The unemployment rate from the last was at 5% going into the recession and didn't see that again until 2015, so let's use that timeline to base the rest of the conversation. Assuming the recession lasts for ~7-10 years...
Are you planning on retiring during this time or shortly after?
If you have a potential job loss, have you saved enough to cover finding a fallback income stream / have enough to supplement a lower income until finding max-employment?
Are you willing to hold onto non-liquid assets during this time?
Are there major purchases you may have to make during this time? (example: my A/C unit is going on 15 years and has shown signs of dying. HVAC rep recommended full replacement. Or maybe you've got an aging vehicle, etc.)
Being in a really crap financial situation is the most probable for most people. I'd be prepping for this by increasing savings, inventorying job opportunities and fall backs, selling illiquid assets that you may have been putting off, and planning for future financial sucker-punches however you see fit.
For the rest of the doom and gloom prep, I'll defer to others.