As Robert Roberson’s execution neared, Texas Gov. Greg Abbott stuck to silence

In a state where the death penalty is as ingrained as cowboy boots and conservative politics, news of Robert Roberson’s death sentence broke through in Texas after the rarest of phenoms: a noisy, bipartisan effort that bypassed the governor’s office to save a man from lethal injection.

For years, the appeals of Roberson’s capital murder conviction for the 2002 death of his chronically ill, 2-year-old daughter had lumbered through the courts, tracing a byzantine process that often fails...