"I don't believe you can find any evidence of the fact that I have changed government policy solely because of a contribution"

This quote by William J. Clinton suggests that he has not altered federal government policy due to any contributions he has actually gotten. This indicates that he has not been affected by any contributions or kickbacks, which he has made decisions based upon what he thinks is best for the nation. This quote also recommends that he is positive that no proof exists to prove otherwise. This could be interpreted as an indication of stability, as he wants to stand by his decisions and not be swayed by any external elements. It might likewise be viewed as a sign of confidence in his own judgement, as he is sure that no proof exists to prove that he has actually been influenced by any contributions.