The correct answer is "possessed a shrewd intelligence and a compulsive love for combative politics. "
Richard Nixon, who served as a Senator and Vice President before running for President in 1960, was known for his aggressive policies. This includes his search for communists in American society during the Second Red Scare. This is evident from the Mundt-Nixon Bill introduced in 1948. This would make it so that all communists registered themselves with the federal government and the attorney generals office. This shows Nixon's combative nature, as he wanted to take on communism in the US through force of the federal government.