I am not one to want to wear logos, pins, hats, shirts or other outward display of support or attractions, etc. So, for me, it would be business casual for most meetings, etc. beyond that I would have to do a little research....I've never attended a political convention before.....would love it.
That said, I see the people on TV and do do think "how fun they look" but I would not feel comfortable dressing in anything other than what I would normally wear to a public meeting.
The statement I think is the most important to make is (listen to all side) (2) research to get to the deeper meaning in some words and statement (3) think things through based on what you are hearing, reading and researching....make a decision and then VOTE.