Yes.
Although the constitution does not mention the issue of secession, The Supreme Court has consistently interpreted the Constitution to be an "indestructible" union. The states cannot leave the Union. There is no legal basis a state can point to for unilaterally seceding.
Answer:
delieving a speak for the fourth of July
James Garfield was the Rosecrans's chief of staff who later became a president of the United States. James A. Garfield served as chief of staff under Major General William S. Rosecrans, the commander of the Army of the Cumberland. Garfield resigned in<span> December 1863 from the Army to take his seat in the U.S. House of Representatives.</span>
The correct answer is "pressure from anti-communist republicans."
After World War II, the US and Soviet Union emerged as global superpowers. Their difference in political ideology lead to a battle for global power and influence. This battle caused for the US to get rid of any possible communist influences or Soviet spies within the federal government. This pressure, put on by Republicans who felt that Democrats were "soft" about getting rid of communism, lead Harry Truman to put into place the loyalty program (also known as Executive Order 9835).