Answer:
He was receiving political pressure from his constituents.
Explanation:
The Anaconda Plan was created by Union General Winfield Scott, and came into use in 1862. It instituted a siege of the Confederacy by the Union, through a naval blockade, to control the Mississippi River and the Tennessee River, thereby fencing and dividing the Confederation.
Many people disapproved of this plan because, according to them, it was a very slow and passive plan, these people made political pressure on the president of the republic, causing Lincoln to abandon the Anaconda plan and adopt the McClellan strategy