The character depicted in the cartoon is likely intended to represent President Franklin D. Roosevelt (FDR).
The artist is criticizing Roosevelt's policies, suggesting that he is acting as a king by cancelling or disregarding the Constitution of the United States.
This is indicated by the document labeled "Constitution of the United States" being crossed out with "Cancelled" and FDR's initials. The phrase "THE KING CAN DO NO WRONG" above the image implies that Roosevelt is placing himself above the law, a stance that is traditionally associated with a monarchical rule where the king was considered infallible.
The cartoon reflects opposition to what some contemporaries viewed as an overreach of presidential power during Roosevelt's administration.