Like many Americans doesn’t support that nowadays. Using cheap clothes made with the help of child labor or in sweatshops under borderline slavery practices is supporting slavery. Don’t play the victim card as anyone with access to the internet can find that most of the clothes sold in the US came stained with blood and sweat of the new era of slave workers.
You like you PC or cell phone made in China. Boom, you are also supporting slavery with not only supporting a regime that is criticized for they disrespect of human rights, but also supporting factories with terrible conditions and workers practices that had made the implementation of suicide nets a must sometimes.
It’s not only Trump supporters; many liberals do it too. The only difference is they do it in a more subtle way.