IVYLAND, Pa. — When Donald J. Trump is in trouble with women voters, he has often called on his daughter Ivanka, an executive and entrepreneur as smooth as he is rough-hewed, as calming as he is potentially alarming.

Ms. Trump had attacked the “false narrative” of her father’s misogyny on television a month ago, and she declared in the spring that he was “not a groper” in response to a New York Times account of his treatment of women. It was Ms. Trump, 34, who persuaded her father to add child care support to his policy proposals.

Ms. Trump returned to the campaign trail on Thursday for the first time since the emergence of a recording of Mr. Trump vulgarly describing how he liked to grab women by the genitals and force kisses on them.

On a carefully stage-managed swing through the Philadelphia suburbs, Ms. Trump avoided mentioning the 2005 recording or a series of accusations by women who said the Republican nominee had gone beyond braggadocio to active groping.