Its been nearly 10 years since we had a recession. They typically occur about every 5 to 7 years. A recession is defined as two straight quarters of negative economic growth. In 2009 we had the worst recession ever. It does mean the next will be as bad it may be but likely will not.
The problem is with Trumps plans which depend on growth even. Our current growth rate is slower than what he needs for his polices. The next recession we derail the "Trump Train". After a recession the government typically does large amounts of deficit spending .Trump already wants to borrow a trillion of the next ten years . The reaction to the next recession would be another trillion or more. It was Trump himself who brought up the issue of our 20 trillion dollar debt. How can he get the economy our of a recession with adding to the debt?
In Trump's own words " when the economy gets bad we can borrow money"