Climate change, for sure ! There is no planet B !!

I would name poverty 5. All they have to do in Flint is go back to the old pipes, that were fine except for the fact the governor wanted to award a huge construction contract to one of his buddies to build the new pipeline

Homelessness failed to make the top 5? While Flint's water crisis was important it was localized, the homeless are nation wide.

As Churchill said, " Americans always do the right thing after exhausting all other possibilities".

I hope they weren't in the order of importance. Climate Change should be at the very top followed by gun violence.

Climate change and gun violence are the two at the top of my list. Addressing those problems would have the biggest future effect on the welfare of the country.