It didn't even take an afternoon. As soon as the "Brexit" outcome became clear, it took about ten seconds flat for "Texit" to become a thing.
"Our phones are ringing off the hook. Our social media is going nuts. We are definitely riding a wave of momentum. and we plan to ride it all the way to getting and winning a referendum on succession," [Texas Nationalist Movement president Daniel Miller] told TPM in an interview shortly after the Brexit vote results were announced. "It is just a phenomenal thing. I know our supporters are energized by it."
That's right, kids. The same chipper faces that very nearly got Texas secession to be an official plank of the Texas Republican platform (and take a moment to absorb that, why don't you), are feeling pretty giddy about their chances in the wake of the market-roiling clusterplop that took place in the United Kingdom. Let's get us a big heaping helping of that, say the folks who think that what Texas really needs is to be Not-America because reasons.
Alas, there are still problems with the plan. As much as certain Texas "nationalists" would like to believe otherwise, Texas ain't in Europe. While the United Kingdom can, if it likes, bow out of the European Union—it is, after all, a distinct nation—American states are not distinct nations and have no rights whatsoever to bow out of the United States. (For additional reference material on this subject, please refer to Sherman's March to the Sea.) And no, Texas does not have special rights in this regard; even conservative wonderjurist Antonin Scalia was quite clear about that.
So unless the other 49 states agree to the plan via modifications to the Constitution itself, it's a moot point. On the other hand, most of the more immediate effects of the UK referendum—specifically, panic and next-morning remorse—would indeed apply over here. The strongest similarity, though? Much like the Brexit vote, it seems most individual voters keen on the idea of Texas secession have never once actually thought the thing through.
The thought experiment is undeniably intriguing. What the hell—a vote might be worth it just to see what side current Texas Gov. Greg Abbott would personally take. Previous Gov. Rick Perry made mewing noises about Texas secession a few times, and it didn't seem to hurt his career nearly as much as his subsequent failure to Remember Three Things: If the vote actually went through, whichever poor sap was in the governor's seat at the time would be in a bit of a bind. Say goodbye to your presidential ambitions if you come from a place that just voted to leave 'Merica altogether.
On the other hand, becoming a New World dictator has appealed to many ambitious sorts looking for a quick career boost—and it usually comes with a free hat.