Here's the best idea I've seen in a long time:
There are similar petitions for a bunch of other states, but Texas has more signatures than all the others combined. I'm not Texan, but I signed. The funny thing is, Texas, uniquely, is legally allowed to secede with no say-so from anybody outside Texas. That was one of the conditions Congress agreed to when it took Texas in. Texas controls 36 House seats. Let them take Oklahoma with them, and that's 41 House and 4 Senate seats.
The best thing is, they would immediately declare war.