A State of Disobedience by Tom Kratman

It's Time to Remember the  Alamo All Over Again!

In the long war against terrorism, the US Government had taken on extraordinary powers. And now that the war was won, powerful forces in the government had no intention of relinquishing those powers. As in 1860, the country was on the verge of civil war. And as in 1860, a leader arose to save the country—but it was not the President this time. Instead, the Governor of Texas was the woman of destiny. And, though the Federal Government had more guns and troops, David was about to give Goliath a run for his money. . .

"Probably the most realistic depiction of a second American Revolution ever written." —John Ringo

http://www.baen.com/a-state-of-disobedience.html#

Good book....read this a couple of years ago....he has another good one too called Caliphate....about a Muslim dominated world....

good book.  i enjoyed it.   I wouldn't say it's particularly realistic though.