When you travel abroad, what do you tell people about your nationality?

Pretty much what the title says. I'm traveling to Europe in a few days and am terrified of what people will think when they learn I'm American. They always say it's not what they say to you - it's what they say about you. Should I pretend to be Canadian so that nobody asks me about Trump? Apparently Europeans don't take "I didn't vote for him" as an excuse. I hate that I have to add a qualifier whenever I tell people my nationality, but that's where we're at. Any advice?