L. Michael Lawrence writes:

Bill Groom writes:

Many of the so-called Copperhead Democrats openly flaunted their political position by adopting and wearing a Copperhead badge. The badge was nothing more than a cut-down, miniaturized large cent. The obverse stars and reverse legend, United States of America, were removed. The obverse Liberty head was displayed, and a pin was typically soldered to the reverse. The Copperheads were a distinct minority and largely reviled. Rather than invite assault, many of them took to carrying this symbolic token as a pocket piece to share with fellow Copperheads. Below are shown a few examples ...

Here's a contemporary newspaper article about the badge ...

To read the earlier E-Sylum articles, see:
QUERY: OCTAGONAL LARGE CENT INFORMATION SOUGHT(https://www.coinbooks.org/v22/esylum_v22n38a09.html)
COPPERHEAD TOKENS OF THE CIVIL WAR(https://www.coinbooks.org/v22/esylum_v22n39a13.html)
WAYNE'S NUMISMATIC DIARY: FEBRUARY 26, 2023, PART 1 : Cut Down Large Cents(https://www.coinbooks.org/v26/esylum_v26n09a28.html)
Another Cut Down Large Cent(https://www.coinbooks.org/v26/esylum_v26n10a07.html)