The Tennessee legislature did not take up the voucher proposal because the sponsor realized it didn’t have the votes to pass.
Initially he wanted statewide vouchers but rural legislators were not interested. Then he narrowed it to four counties with urban districts. Then he narrowed it only to Shelby County, that is, Memphis. The sponsor, a conservative Republican, wanted (of course) to save poor kids in failing schools. 
But many legislators were dubious that vouchers actually work. There is plenty of evidence they don’t. So the bill was shelved for another day. 
We can hope that day never arrives. 
Congratulations to the BATS, the Momma Bears, the Tennessee Education Association, and other fighters for public education!