in 2014, he's running a super pac ad about gary johnson. here it is. >> thinking about voting for garris johnson? in case you missed it, climate change will cost millennials over $8 trillion if no one does anything about it. so gary, you got this, right? >> we should be building new coal-fired plants. in billions of years, the sun is going to actually grow and encompass the earth, right? >> well, i tell you, though -- >> probably an effective message. but to the extent to which this is a problem for the clinton campaign, think of new hampshire yesterday. new hampshire looks -- she's doing fairly well in new hampshire, but it's potentially competitive. among under-30 voters in new hampshire, our own nbc