Even Michael Savage had had enough.

As the insults and innuendos over candidates’ wives and tabloid reports of suspected affairs dominated the back and forth between Senator Ted Cruz and Donald J. Trump, Mr. Savage, one of the country’s most popular conservative radio hosts and an ardent supporter of Mr. Trump, drew a red line last week.

“I’ve supported Trump and probably still will, but if he won’t disavow this guy Pecker and this story, I may withdraw my support,” he said on the air on Friday. He was referring to David J. Pecker, the owner of The National Enquirer, which published the allegations of sexual affairs against Mr. Cruz. “I am not going to support anyone who engages in assassination by innuendo,” Mr. Savage added.

But on Monday, Mr. Trump and Mr. Savage reconciled in a mostly fawning interview, with no apology from Mr. Trump, who nevertheless called The Enquirer’s allegation that Mr. Cruz had affairs “garbage.”

The momentary rupture, however brief, was emblematic. As the fractures in the Republican Party over the candidacy of Mr. Trump grow deeper by the day, conservative talk radio is having its own identity crisis.