The divide began with the end of the Bush Jr. era.
Obama split the nation in half based on race grievance as he identified and supported hoodlums (no pun intended) over and above law enforcement officials.
Obama favored anti-American pastors and other radical, Muslim, hate “old white men”. Thus, were born BLM, Antifa and other hate groups.
This divide was wide open for Trump to come out and take advantage of the natural American tendency for love of country, God and family and a strong nation.
Those “Never Trumpers” have been stirring the boiling pot hoping it will spill over into civil war ever since.
If Bernie Sanders get’s the nod from the Democrats this will just prove the theory that they will do anything to remove Trump from the Presidency.
The seeds of the divide were planted a century ago by the folks of the Frankfurt School.
this has been going on a lot longer than Obama, 70s