The law firm representing senior White House adviser Jared Kushner has hired a veteran of prior White House investigations to handle press relations for the firm’s clients.

Abbe Lowell of Norton Rose Fulbright, a lawyer representing Mr. Kushner and other high-profile clients, has hired Peter Mirijanian, who has run his own public-relations firm for more than 10 years, according to a person familiar with the matter. Mr. Mirijanian wasn’t hired to work specifically on Mr. Kushner’s case, the person said.

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