I honestly don't know. Clinton's leading in polls, but she's not getting very good turnout for rallies. Either the polls are skewed, or most of her supporters aren't actual supporters. They're just people who don't want Trump to win. If they don't turn up for the rallies, then there is a decreased likelyhood that they'll turn out on Election Day.
Most of America probably wants Clinton over Trump, but Trump has more dedicated supporters who are more likely to show up to the polls.
The whole rallies = turnout = support conjecture is categorically false.