One of the deadliest school shootings in U.S. history. The revival of a 1920s ban on abortion. The country’s worst episode of migrant death in recent memory. And an electrical grid, which failed during bitter cold, now straining under soaring heat.

The unrelenting succession of death and difficulty facing Texans over the last two months has soured them on the direction of the state, hurting Gov. Greg Abbott and making the race for governor perhaps the most competitive since Democrats last held that office in the 1990s…

A separate poll, conducted by the University of Texas at Austin and released this month, showed 59 percent of respondents thought Texas was on the “wrong track,” the highest number in more than a decade of asking that question. Another, from Quinnipiac University, found Mr. O’Rourke within 5 percentage points of the governor.

As the new polls showed Mr. O’Rourke’s numbers improving, Mr. Abbott’s campaign convened a conference call with reporters this month.