Because he isn’t running against her! Wait until he wraps up the nomination and begins to pull the party together. there is no campaign against Hillary yet. Be patient.
Pull the party together? Seriously? 53% of women in the country have a negative opinion of him. How does that change. Hillary will spend millions replaying all the sexist stupid remarks he has made.
The thing is I bet 90% of the people already have an opinion of Trump. It ain’t gonna change.
A vote for Trump is a vote for Hillary.