Rep. Nancy Mace, R-S.C., questions U.S. Secret Service Director Kimberly Cheatle (AP Photo/John McDonnell)
Mace appears to be the only member of Congress targeted by the suspect for now, the source told Fox News Digital.
It's not immediately clear why Mace, an outspoken Trump ally, was threatened.
But it comes amid concerns about escalating threats against elected officials on both sides of the aisle.
Trump, who was subject to two failed assassination attempts during the 2024 election, was targeted by Monper in a series of threats on YouTube, according to a release by the Department of Justice (DOJ).
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Rep. Nancy Mace speaks on Day 3 of the Republican National Convention (RNC), at the Fiserv Forum in Milwaukee, Wisconsin, U.S., July 17, 2024. (REUTERS/Mike Segar)
The U.S. Secret Service was alerted to the suspect's threats against Mace as well, the source told Fox News Digital.
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U.S. Capitol Police said it would not comment on potential investigations when reached for confirmation.
Mace's office did not immediately return a request for comment.
Elizabeth Elkind is a politics reporter for Fox News Digital leading coverage of the House of Representatives. Previous digital bylines seen at Daily Mail and CBS News.
Follow on Twitter at @liz_elkind and send tips to elizabeth.elkind@fox.com
https://www.foxnews.com/politics/nancy-mace-targeted-pennsylvania-man-arrested-threatening-trump