In terms of personality, I'd say that some presidents are definitely more user-friendly than others. How do you even go about measuring such a thing? Nixon certainly liked to use presidential power aggressively. He was still committed to the idea that the job of a president was to preside and was to try to work out deals with Congress on problems of the day. Nixon still understood, at some level, the importance of governing.
About 2 percent of the black population of mexico is white.
( z0 white :ARG1 ( z1 population :ARG1-of ( z2 include :ARG2 ( z3 population :ARG1-of ( z4 black ) :mod ( z5 country :name ( z6 name :op "Mexico" ) ) ) :ARG3 ( z7 about :op ( z8 percentage-entity :value 2 ) ) ) ) )
(z0 / white-02
    :ARG1 (z1 / population
              :ARG1-of (z2 / include-91
                           :ARG2 (z3 / population
                                     :ARG1-of (z4 / black-05)
                                     :mod (z5 / country
                                              :name (z6 / name
                                                        :op1 "Mexico")))
                           :ARG3 (z7 / about
                                     :op1 (z8 / percentage-entity
                                              :value 2)))))
About 2 percent of the black population of mexico is white .
z8 :value 0
z7 :op1 z8
z2 :ARG3 z7
z1 :ARG1-of z2
z3 :ARG1-of z4
z2 :ARG2 z3
z3 :mod z5
z5 :name z6
z6 :op1 1
z0 :ARG1 z1