it would be even dumber for Russia to try this. Barring a nuclear exchange, Russia would get trounced by the full EU. It might even cease to exist in its current form.

Dynamic Force Employment: A Vital Tool in Winning Strategic Global Competitions

https://www.realcleardefense.com/articles/2018/09/18/dynamic_force_employment_a_vital_tool_in_winning_strategic_global_competitions_113809.html

Trump is trying to repackage some of these changes which probably would have happened anyway into his damaging transactional approach to negotiations with allies, Germany in particular. Offering a "trip wire" strategy in Poland, or Latvia reminds me of the "phony war" in Poland early in WWII. I don't think anything more than a token force, and a mobile one that deploys periodically rather than permanently should ever be stationed on Russia's border. It's contrary really to the DFE intent. This OP seems somewhat inconsistent with the announcement of movement of some of these forces to Belgium.

Similar considerations went into the withdrawal of US forces from near the DMZ in South Korea and their withdrawal to Pyongtaek. Beyond this an actual removal of additional troops from South Korea is viewed dimly in defense circles, but the Trump administration kept implying it was under consideration while Congress implemented measures to block it.

also I'm pretty sure the Pentagon and the few honorable IC's are watching the world's intel . .

election. Then Biden can start repairing ties with Europe and other allies all over the world the Trump has alienated.

...than expected (or somewhere did — can’t recall the example).

Spurred on by President Donald Trump’s demand to pull troops out of Germany, the U.S. will bring about 6,400 forces home and shift about 5,600 to other countries in Europe, U.S. defense leaders said Wednesday, detailing a Pentagon plan that will cost billions of dollars and take years to complete.

The future of the plan is uncertain, at best, since it relies on support and funding from Congress, and a number of members have voiced opposition. And it may not survive at all if Trump isn’t re-elected.

Lawmakers have condemned the troop cuts as a gift to Russia fueled by Trump’s spite at Germany.

https://www.washingtonpost.com/world/national-security/officials-us-to-bring-6400-troops-home-from-germany/2020/07/29/293f7af4-d19c-11ea-826b-cc394d824e35_story.html