Yang is really capable of bring out a populist wave like Trump, the only issue is exposure. Normies are drip-fed mainstream news and TV which mention him once a month at best. However, if "scandalous alt-right figure X endorses Yang"(which they already do) he will start to get free negative publicity, and media will be covering it obsessively for weeks(just like anti-Trump shilling kept his name in public mind 24/7).