I was very pleased to have had the opportunity to visit, along with my young daughter, both institutions back inthe mid 80s. It was humbling to be in both places.
I would advocate coat and tie, at least a jacket.
I , myself, would most certainly wear a business suit when visiting the White House (and I HATE wearing a suit), but all they are requiring is minimal office clothing.
This is how it happens. First they tell us how to dress in the WH, then they tell us how to dress elsewhere. Slippery slope folks. Soon, they will tell us what to think, and we’ll all be wondering how it happened that we are all slaves to the new and improved King George. Can you say “stupid, unquestioning public”? People who back the WH’s decision on this are even stupider than I thought; one step closer to tyrrany. Wake the hell up, people.
I would advocate you stay where you're at...And I'll stay here with what little liberty we have left...
Even if not a tie and jacket, at the very least you should be required to wear a shirt (not Ts), pants (no denim) and shoes (no sneakers). I have visited the House many times as a tourist and I cringe each time I see women wearing skimpy shorts, tank tops/bras and flip flops, who wouldn't know the first thing about government (women otherwise I would love to see in the same attire but in a different surrounding).
The WH is not a GD'ed Six Flags Over America (at least when the GOP is in office). Nobody is stopping you from visiting, but when you do, please show it the respect it deserves.