In an interview, Clinton stated,
There are enough stories out there that I don’t think everybody is just sitting in their kitchen, making them up.
I remember Newt Gingrich discussing moon colonies during his presidential bid and all he got was a few chuckles. I don't expect Clinton will gain more than that.
What I would like is full-throated support for a Martian mission. That might excite more Americans and move us beyond tax records, speech transcripts, hand size, and other topics that only frustrate the electorate. We need something hopeful for our future.