Answer :
The allusion in the statement is "feeling like Atlas carrying the weight of the world upon his shoulders," which is a mythological allusion to the Greek Titan Atlas.
The allusion being referred to is "feeling like Atlas carrying the weight of the world upon his shoulders." This phrase alludes to the Greek Titan Atlas, who was condemned to hold up the sky for eternity. It is a mythological allusion as it references a character from ancient Greek mythology. The metaphor is used to describe the heavy burden of responsibilities and decisions that the president must carry, akin to Atlas's eternal burden.
Presidential actions, such as signing treaties, are significant and can symbolize commitments and recognitions on behalf of the entire nation. In this context, the president's allusion to Atlas illustrates the gravity and impact of his decisions on international affairs and the country as a whole.