After his landslide reelection in 1936, Franklin D. Roosevelt unsuccessfully attempted to push which of the following initiatives through the United States Congress?

Roosevelt did advocate for increased support to allies and military preparedness prior to the U.S. entry into World War II, but he did not seek immediate intervention in the European war during his 1936 term. The U.S. remained largely isolationist until the attack on Pearl Harbor in 1941, making this choice incorrect.

While Roosevelt's administration faced pressure to address civil rights issues, he did not attempt to repeal antilynching legislation after his 1936 reelection. In fact, he remained largely passive on civil rights, often avoiding controversial issues to maintain political support, making this choice also incorrect.

The Civilian Conservation Corps (CCC) was established in 1933 as part of the New Deal and continued to operate successfully during Roosevelt's presidency. After his 1936 reelection, there was no need to push for the establishment of such agencies, as they were already in place and functioning. Thus, this choice does not accurately reflect an unsuccessful initiative post-1936.