Imagine the Democrats "run the table" in November, and we have a Democrat President, and Democrats control both houses of Congress.
Among many other things, direct and indirect, it will usher in an age when Democrats win every national election, as far as the eye can see. How does this happen? Three words, a "path to citizenship." The thirty or forty million illegals currently in the country will ALL be converted to voting Democrats. This is why the Biden Administration is dumping so many illegals into "swing states."
The current Supreme Court, which at least pays lip service to the Constitution, will be overwhelmed one way or another and replaced with a cadre of Ruth Bader Ginsberg's, who will rubber stamp every Leftist wet dream from socialized medicine to the abolition of cash bail.
The ONLY thing that will restrain them would be the unpleasant obligation to pay the interest on the National Debt, but I wouldn't put it past them to simply default on the Debt and say fuck-you to China and our other financiers.
Iran, Russia, China, and other bad actors will have a field day overwhelming Israel, Taiwan, Ukraine, Finland, and anyplace else they desire, knowing that NATO's backstop - a strong and decisive USA - is a paper tiger.
Seriously, this is a scenario that is too awful to contemplate.