Are you implying that politics just might not control the economy? Oh my...who are we going to praise or blame now for uncontrollable forces or events?
I would suggest that politics absolutely DOES control the economy. If Republicans impose trade tariffs, deregulate the financial industry, and cut taxes on the rich in order to reduce government income, bad things will happen. The economy will contract, deficits will go up. Those are direct consequences of political intervention in the economy.
Just look at 2001-2008, as a good example of how Republican's policies can directly impact the economy. Massive deregulation, tax cuts for the rich to reduce revenues, new entitlement programs to increase spending, and two new wars funded purely with deficits. Result: economic collapse.
Then Democrats took control and instituted stimulus, raised taxes on the rich, and reduced war spending. Result: 8 years of job growth, wage growth, market growth, and GDP growth. They could have done better, but at least they stopped making it worse.
Now we have Republicans in control again. Does anyone want to wager on how long it takes them to return to massive deregulation, tax cuts for the rich, new entitlement programs, and increased war spending? They're just chomping at the bit to repeat the bad parts of this cycle, and now they will claim they're doing it because "it's what the American people demanded."