Why did Lincoln fear he might not be reflected?

Lincoln feared he might not be re-elected due to a combination of factors, including the ongoing Civil War and the growing discontent among voters regarding the war's progress and its heavy toll. His administration faced criticism from both Democrats and factions within his own party, leading to concerns about losing support. Additionally, the emergence of the Peace Democrats, who opposed the war, posed a significant electoral threat. These uncertainties contributed to his anxiety about his prospects for a second term.