Since late twentieth and early twenty-first centuries, the border region, including el paso, mcallen, and brownsville, has remained politically a bastion.

The correct answer to fill in the blank is:

El Paso, Mcallen, and Brownsville, has remained politically a Democratic Party bastion.

Along with the Republican Party, the Democratic Party is one of the 2 major political parties in the United States. The main difference between the 2 is that the Democratic party believe that the federal government must take an active role in people's lives, mainly those who are in need while the Republican party believes otherwise.

An example of laissez faire are the economic policies held by capitalist countries. An example of laissez faire is when a homeowner is allowed to plant whatever they want to grow in their front yard without having to get permission from their city.