Secession

Pros:

The federal government has failed to secure the border, seceding would allow Texas to secure itself against the failed country it borders to the south.

Everyone in Texas would cease paying the illegal income tax. This would mean a mass of capital available.

Texas could get away from using the dollar whose value has been dropping consistently

Texas national guard would not be deployed to the Eurasian landmass to fight low intensity conflicts when they are supposed to be weekend warriors who assist in disasters

Texas would now be able to negotiate its own trade treaties, to benefit its workers. This would mean no NAFTA/ CAFTA with its economic dislocations

Texas could follow the will of its people in regards to abortion as Roe v. Wade would not apply

Texas would be free to develop without the mass of federal regulation. This would mean high international competitiveness. Texas is a globally competitive-sized economy as is. This would also mean more small business

Texas could uphold its anti-drone statutes, extend protections to the right to bear arms, and opt out of the Obamacare disaster as well as any future disasters legislated by Washington

Texas would be free to set its own minimum wage laws. This would create jobs

Texas would be free from Corporate Taxes. This could mean even more companies headquartering in Austin and more activity in the Houston Port. Federal duties on shipping would be gone.

Texas would be free to enforce existing drug statues according to the model used by the federal government or revamp them.

No excise taxes on tobacco and liquor. No more environmental regulation at the federal level.

Cons: the U.S. Federal Government believes in a strong union theory of the Constitution that regards secession as illegal because the constitution represents 'government by the people as a whole' rather than by the states coming together as units and forming the federal government. This would mean they would respond with force as they have in the past when states tried to leave the union. Another problem would be all recipients of federal aid would be out of their benefits.