This cartoon is from 2007 but the point is still valid. Clement Vallandigham (D-OH) was a Member of Congress (1858-1862) and the leader of the pro-South “Copperhead Democrats.” He was the 1864 Ohio Democratic gubernatorial nominee even though he was living in exile in the South.
Vallandigham said the United States under Abraham Lincoln was “the worst despotism on earth,” and he sought the intervention of a foreign power to help the Confederacy. He urged young men not to enlist in the Union Army and attacked “King Lincoln” for waging a war to liberate blacks.
In Illinois the Democratic majority in the state legislature urged Lincoln to withdraw the Emancipation Proclamation freeing the slaves. Indiana’s Democratic majority in the legislature had the same opinion, and they came close to taking over the state militia so it could withdraw from the Civil War.
They presented a serious challenge to the first GOP president, and Lincoln referred to them as “the fire in the rear.” Vallandigham was convicted of treason but was pardoned by Lincoln. He died at age 50 after accidentally shooting himself.