Why did the victories at Gettysburg and Vicksburg helpLincoln win reelection?

The victories at Gettysburg and Vicksburg in July 1863 were pivotal for President Abraham Lincoln's reelection in 1864 as they marked significant turning points in the Civil War. Gettysburg halted the Confederate invasion of the North, while Vicksburg gave the Union control of the Mississippi River, effectively splitting the Confederacy. These successes bolstered Northern morale and public support for the war effort, shifting the political landscape in favor of Lincoln and the Union cause. Ultimately, these victories helped to validate Lincoln's leadership and policies, making him a more favorable candidate for reelection.