Personality Plays a More Important Role in Explaining the Presidency

Personality plays a more important role in explaining the presidency than it does in explaining Congress because a president is

A) more likely to rely on hands-on politics and persuasiveness to enact policy.
B) less constrained by the rules and roles that operate within government.
C) more likely to be judged by his character in addition to his accomplishments.
D) relatively immune from public opinion and polls.
E) less constrained by the judiciary or current notions of constitutional principles.