The clash between the Biden Administration and Texas spilled out into the open last week, when the US Supreme Court ruled that Federal authorities could remove razor wire that Texas Governor Greg Abbott had been installing along the border with Mexico to stop the millions of illegal immigrants from crossing over to the United States.

This time Abbott did not back down. Instead, he issued a statement declaring that "an invasion under Article I, Section 10, Clause 3" of the US Constitution is underway and invoking "Texas's constitutional authority to defend and protect itself."

Here Governor Abbott answers an important question I brought up back in my 1988 US Presidential run: at what point do open borders and mass illegal immigration into the US become an "invasion," which would grant governors the authority – and obligation – to take action?

By some estimates, more than six million illegal immigrants have crossed into the United States during the three years of the Biden Administration. These illegals likely mostly come from Mexico and Central America, but the fact is we have no idea how many of them may be arriving from, for example, the Middle East or other war-torn areas of the world. Last month even the New York Times wrote of the disaster on the US border that, "thousands of migrants are arriving at the border every day, trekking from the farthest reaches of the globe, from Africa to Asia to South America, driven by relentless violence, desperation and poverty."

With the world awash in US weapons, it's not hard to imagine the danger of the situation.