Trump delivers ominous omen to embattled Texas Republican

The Republican primary for the 23rd Congressional District is ending on a deeply uncertain note as Rep. Tony Gonzales, R-San Antonio, appears more politically imperiled than ever and both parties contemplate a potential general election without him.

The primary was upended as early voting began last week, when the San Antonio Express-News reported that Gonzales had an affair with an aide who later died after setting herself on fire. The story prompted a wave of other damning revelations about his relationship with the aide...