What does "I am hopeful today" mean?

Does "hopeful" mean "an ambitious and aspiring young person"?

Context:

This country has more wealth than any nation, but that's not what makes us rich. We have the most powerful military in history, but that's not what makes us strong. Our university, our culture are all the envy of the world, but that's not what keeps the world coming to our shores. What makes America exceptional are the bonds that hold together the most diverse nation on Earth, the belief that our destiny is shared -- (cheers, applause) -- that this country only works when we accept certain obligations to one another and to future generations, so that the freedom which so many Americans have fought for and died for come with responsibilities as well as rights, and among those are love and charity and duty and patriotism. That's what makes America great. (Cheers, applause.)

I am hopeful tonight because I have seen this spirit at work in America. I've seen it in the family business whose owners would rather cut their own pay than lay off their neighbors and in the workers who would rather cut back their hours than see a friend lose a job. I've seen it in the soldiers who re-enlist after losing a limb and in those SEALs who charged up the stairs into darkness and danger because they knew there was a buddy behind them watching their back. (Cheers, applause.) I've seen it on the shores of New Jersey and New York, where leaders from every party and level of government have swept aside their differences to help a community rebuild from the wreckage of a terrible storm. (Cheers, applause.)