Thanks everyone for your thoughts.
Interestingly, we already own a big chunk of Vanguard Total Stock Market Index. I know someone also mentioned the idea of buying into a financial sector fund, but DW didn't want to buy more of the Vanguard stock index fund precisely because it includes financial stocks! (yeah, some emotion here). We also own a big chunk of the Vanguard Inflation Protected Securities Fund.
And we owned some Vanguard High Yield Corporate until about two years ago when we sold it all. Becoming an equity holder through buying bonds. That is funny and sad.
We will be thinking about some of the other suggestions (energy, commodities, staples, gold, guns, ammo, and alcohol). At the end of the day, I think uncertainty and a prevailing conservative attitude will cause us to put the cash in a CD or maybe a AAA intermediate muni bond fund. Lol.