After Brexit, Texas Secessionists are newly emboldened. So how would a secessionist vote go today in Texas. A 2009 Rasmussen poll puts support for secession at about 25%. In 1861, delegates to the Secessionist Convention voted 166 to 8 in favor of leaving the Union. Red guesses that secession would be overwhelmingly defeated today, but the hardcore secessionists are not simply going away.