3 of 5 Texans favor secession yet the poll linked below says Trump leads Texas by only 6 points. What gives?
http://www.publicpolicypolling.com/pdf/2015/PPP_Release_TX_81616.pdf
You miss-read it. The title says 3 out of five TRUMP SUPPORTERS from Texas want to secede, not that 3 out of 5 Texans do.