"Critical mass" will probably be achieved early in the second term.

But there will be no 2nd term for Trump. A Democrat will be in the White House and he will get blamed for the Hard Times of 2020-2024. And if that Democrat manages, after much pain and sacrifice, to turn the economy around like Obama did, the backlash will elect another Republican majority who can resume the looting in 2025.

To stop the Republican party once and for all will require a major economic meltdown to begin as soon as possible, otherwise we will never get our politics back in phase with our economy. Trump knows this, and it explains his tax policy. The only other alternative for Democrats is if the GOP wins in 2020 and the coming crash is all on them.

Think in terms of a leaf spring and a shock absorber, or an inductance coil and a capacitor hooked up in parallel. If both are tuned to work together, any oscillations are quickly damped out. If not, the system is unstable and vibrates to destruction, each swing greater than the last until the feedback shakes the system apart.