Melania Trump has insisted that her husband is a "gentleman" and that the women who allege that he sexually assaulted them are lying.
She also said that lewd comments Donald Trump made about women that were caught on videotape were unacceptable but did not represent the man she knows.
The Republican presidential nominee was guilty of "boy talk" but was "egged on" by TV host Billy Bush, she added.
The tape prompted dozens of Republicans to drop their support for him.
In the video, Mr Trump tells Mr Bush, who was then host of NBC's Access Hollywood, that he can force himself on women because he's a star.
Several women have since come forward and accused Mr Trump of sexual assault, which he denies.
"I know he respects women but he is defending himself because they are lies," Mrs Trump said in an interview with CNN.
"I believe my husband," she said. "My husband is kind and he is a gentleman and he would never do that."
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