Rudy Giuliani is seen here with Donald Trump in 2016. Federal authorities executed a search warrant on Giuliani’s apartment, a person familiar with the matter tells NPR.

Rudy Giuliani is seen here with Donald Trump in 2016. Federal authorities executed a search warrant on Giuliani's apartment, a person familiar with the matter tells NPR.

Rudy Giuliani is seen here with Donald Trump in 2016. Federal authorities executed a search warrant on Giuliani’s apartment, a person familiar with the matter tells NPR.

Prosecutors have unsealed an indictment against President Trump’s attorney Rudy Giuliani, seen here in a photo from 2016.