...Let SCOTUS be tied, 4-4. Hence, no decisions, no changes...
Not a good idea. When that happens, there will be binding decisions of the lower Court that SCOTUS is hearing on appeal.
So, actually, a tie on a lower Court’s decision to approve blanket amnesty for illegals, or approving confiscation of your guns gets a tie, the lower Court decision is binding till a 9th Justice is seated. Then the case CAN be heard again for a tie breaker.
10 Supreme court justices have been recess appointments. If the Republicans lose the Senate, Trump should appoint one the day after the election, before Congress returns.
There is another way to make it odd again.