What do you think about the hypocrisy of Thomas Jefferson and other signers of the Declaration of Independence owning slaves?how should Americans feel about this?

I think that you shouldn't overthink it too much. You need to keep in mind that it was a different time. Slaves were considered property. Americans shouldn't judge them too harshly, because if we judge past issues with the lens of today, we could keep saying how bad humanity was as a whole

in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.

i would say that the politicial parties from state to state varies.