Are We Headed for Civil War?

“The United States shall … protect each [state] against Invasion.” U.S. Constitution, Article 1, Section 10
This was one of the constitutional clauses invoked by Texas Governor Greg Abbott when he issued his statement asserting his right to defend his state's borders.
It was, as they say, the shot heard 'round the world.
Now multiple states are taking sides, for and against.
And a showdown seems imminent.

