A package addressed to Treasury Secretary Steven Mnuchin Steven Terner MnuchinOn The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Vulnerable Democrats tell Pelosi COVID-19 compromise 'essential' Pelosi asks panels to draft new COVID-19 relief measure MORE's home in Los Angeles contained horse manure, according to NBC Los Angeles.

The package was reportedly delivered to a neighbor's house in Bel-Air on Saturday, along with a Christmas card referencing Mnuchin and President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE, as well as a negative comment about the Republican-backed tax plan.

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Authorities, including the Secret Service and a Los Angeles Police Department bomb squad, responded, according to the TV station.

Police discovered the package contained horse manure after unwrapping it, and investigators cleared the package around 8 p.m., the report says.

The president signed a sweeping Republican tax-reform package on Friday, marking his administration's first major legislative win.

As Treasury secretary, Mnuchin ardently defended the plan, which is deeply unpopular with the public, according to various polls.